2023 H3C GB0-391-ENU Exam Dumps Questions

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August 25, 2023

H3C certification is a highly valuable and sought-after certification for IT professionals seeking to enhance their knowledge and expertise. GB0-391-ENU exam is specifically designed to validate the skills required to configure and maintain the H3CSE-Routing & Switching platform, which is widely used by businesses around the world. These GB0-391-ENU exam dumps questions are specifically designed to help you prepare for the exam by testing your knowledge and providing you with valuable insights into the types of questions that you will encounter. Test free H3C GB0-391-ENU exam questions below.

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1. When using IKE to provide IPSec with auto-negotiation exchange keys and establishing SA services, which IKE exchange mode is defined in the second phase of IKE negotiation?

Main Mode (Main Mode)

Quick mode (New Group Mode)

Aggressive Mode

Informational Exchange Mode

2. RD is Route Distinguisher, which of the following statement is correct?

The RDs of different VPNs on the same PE cannot be configured with the same configuration.

The RDs of the same VPN on different PE devices must be configured the same, otherwise they will not be able to communicate with each other.

The RDs of different VPNs on different PE devices can be configured the same, and there is no conflict in principle.

3. In the message encapsulated by the GRE protocol, the payload protocol is the IPX protocol and the bearer protocol is the IP protocol. The encapsulation sequence of the message from the link layer to the payload data is?

Link layer IP GRE IPX payload data

Link layer IPX GRE IP payload data

Link layer GRE IP IPX payload data

Link layer GRE IPX IP payload data

4. The user wants to design an H.323 network and requires unified and centralized control of all call permissions. Which of the following components are not necessary? (Multiple choice)

Terminal _

Gateway _

Gatekeeper

MCU

5. Business transmission between departments of an enterprise requires IPSec to provide end-to-end security protection, and data must be encrypted for transmission.

Based on the enterprise's business transmission security requirements, which working mode and encapsulation protocol should IPSec adopt? (Multiple choice)

Transmission mode

Tunnel mode

ESP encapsulation protocol

AH encapsulation protocol

6. Which of the following levels does the SOA - based network architecture divide enterprise IT systems into? (Multiple choice)

Data layer

Service layer

Business layer

IP network layer

7. In the PPPoE application of ADSL, when the CPE side uses an MSR router + ADSL interface card for networking, and the CO side DSLAM uses ATM for uplink, which interfaces need to be PPPoE- related on the centralized router (PPPoE Server) on the CO side? (Multiple choice)

ATM interface

Ethernet port

Virtual-Ethernet

Virtual-Template

Dial -up interface

8. On a public network device in a BGP MPLS VPN network, when you use the displa mpls ldp lsp command to check its label forwarding table, the results are as follows, indicating ______.(Multiple choice)

[PE1] dis mpls ldp lsp

LDP LSP Information

-------------------------------------------------- -----------------------

SN DestAddress/Mask In/OutLabel Next-Hop In/Out-Interface

-------------------------------------------------- ----------------------------------

For the forwarding equivalent class 1.1.1.2/32, the label on the device is 1024

For the forwarding equivalent class 1.1.1.2/32, enter the label 1024 on the device

For the forwarding equivalence class 1.1.1.3/32, this device is the penultimate hop.

For the forwarding equivalence class 1.1.1.1/32, this device is the penultimate hop.

9. When the link type of the ONU port is Trunk, its processing method for upstream packets is ____.

Only allow packets without tags to pass through, and add the default VLAN tag to the packets.

Only allow packets with the default LAN Tag to pass through and remove the tags

For received packets without tags, add the default VLAN Tag; for received packets with tags, forward them directly.

Only tagged packets are allowed to pass

10. Which of the following statement about application layer attack defense is correct? (Multiple choice)

Application layer attack defense can be completed by general network equipment

Application layer attack defense requires the use of professional security equipment.

Application layer attack defense needs to update the attack signature database in real time

Application layer attack defense can be completed once and for all using fixed strategies

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11. Which of the following factors will not affect VoIP voice quality?

Numbering type selected

Packet loss in IP network

Selected signaling type

echo

12. MPLS labels have a total of ______bits, of which the Label label value accounts for _______bits.

48 24

32 20

48 20

32 24

13. Which of the about CBQ is wrong? (Multiple choice)

It is a congestion management technology implemented by QoS policy

Contains 1 LLQ, which is used to support EF services and is sent with absolute priority to ensure delay.

Contains 1 BQ to support AF services and ensure queue bandwidth and controllable delay.

Contains 1 default queue to support BE services and uses WFQ queue scheduling

14. If each team corresponds to a type of message, the proportion of each queue's sending quota increases sequentially, that is, 1:2:3: the maximum number of queues. Assume that the port speed to which this scheduling is applied is 100Mbps. Then when the packets corresponding to each queue are forwarded at a speed of 20Mbps, the port is congested. The bandwidth that can be used by the packets corresponding to the 9th queue is approximately ______

.5.92%

6.58%

6.62%

7.35%

15. Regarding the defense against malformed packets, which of the following statement is correct? (Multiple choice)

For ping of death attacks, you can identify whether it is an attack message by checking whether the length of the Ping request message exceeds 65536 bytes. If the length exceeds 65536 bytes, the message will be discarded directly.

For Teardrop attacks, you can cache fragmentation information. Each source, destination IP, and packet ID are the same to form a group. The maximum cache group is 10,000. When the cached data reaches the maximum, the fragments are directly discarded. At the same time, according to the Cache fragmentation information, analyze the legality of IP packet fragments, and directly discard illegal IP packets to resist attacks.

For malformed TCP message attacks, you can determine whether the message is an attack message by judging the TCP message flag bits. If all 6 flag bits are 1 or all 6 flag bits are 0 or SYN and FIN are both 1 packet are discarded directly.

Malformed packet attacks require targeted defense for each attack.

16. In VoIP networks, the bandwidth saved by VAD technology is related to which of the following factors? (Multiple choice)

The encoding type selected

Network congestion level

Selected signaling type

Speaker’s language and characteristics

17. Which of the following VPN technologies is suitable for corporate employees traveling on business trips to remotely access corporate networks through the Internet?

BGP/MPLS VPN

GRE VPN

SSL VPN

VLL

18. A value of 0 for the S field of an MPLS label indicates ________ .

Indicates that the QoS priority of this MPLS label is 0

Indicates that the MPLS label is the last MPLS label, followed by the MPLS payload message.

Indicates that the MPLS label is followed by the next MPLS label.

Indicates that there is a loop in the MPLS network and the packet will be discarded.

19. In VPN networking, the user's private network packet carries two layers of MPLS labels. This private network packet may be in which of the following packet forwarding stages?

When the packet is sent from the source user side CE to the public network Ingress PE device

When the message is sent from the public network Ingress PE to the P device

When the packet is sent from the P device, the penultimate hop of the public network, to the PE device, the last hop of the public network.

When the message is sent from the public network egress PE to the destination user-side CE device

20. Configure the CA trusted by the PKI domain (the authoritative certification authority is) H3CCA, and configure the URL of the registration server to ca. h3c ． The commands for com are? (Multiple choice)

In PKI domain view, configure ca.identifier H3CCA

In PKI domain view, configure CErtificate identifier-H3CCA

In the PKI domain view, configure CErtificate request url ca. h3c ． com

In the PKI domain view, configure CErtificate url ca. h3c ． com

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21. How does the PPP protocol identify the upper-layer messages it carries as MPLS messages?

During the LCP negotiation phase of the PPP protocol, the peer device completes the negotiation

The peer device completes the negotiation during the NCP negotiation phase of the PPP protocol.

Fill in 0281 in the PPP Protocol field of the PPP header

Fill in 8847 in the PPP Protocol field of the PPP header

22. Which of the following statement about IKE is correct? (Multiple choice)

The first phase of IKE exchange modes has main mode and quick mode.

IKE SA is generated when the second phase of IKE is completed.

Authentication is required for key exchange in both IKE modes.

IKE uses asymmetric key algorithm when exchanging keys

23. During the process of SIP UA calling the called party through the redirection server, _____________. (Multiple choice)

All messages from the calling UA are forwarded through the redirect server.

Except for the location request message, no other messages from the calling UA need to be forwarded through the redirect server.

After the redirection server helps obtain the location of the called UA, the calling UA directly initiates a call to the called U

None of the above are correct

24. As shown in the figure, the three routers create a GRE tunnel between Router1 and RouLer3. The configuration commands for the three routers are? (Multiple choice)

Router1:

[Router1] interface Serial 0/2/0

[Router1-Serial0/2/0] ip address 10.1.1.1 24

ERouter1] interface loopback 0

[Router1-LoopBackO] ip address 1.1.1.1 32

[Router1] interface Tunnel 0

[Router1-Tunnel0] source 10.1.1.1

[Router1-Tunnel0] destination 20.1.1.2

[Router1-Tunnel0] ip address 100.1.1.1 24

[Router1] ospf

IRouter1-ospf-1] area 0

IRouter1-ospf-1-area-0.0.0.0] network 10.1.1.1 0.0.0.255

[Router1] ip route-static 3.3.3.3 32 100.1.1.2

Router2:

[Router2] interface Serial 0/2/0

[Router2-Serial0/2/0] ip address 10.1.1.2 24

[Router2] interface Serial 0/2/1

[Router2-Serial0/2/0] ip address 20.1.1.1 24

[Router2] ospf

IRouter1-ospf-1] area 0

IRouter1-ospf-1-area-0.0.0.0] network 10.1.1.2 0.0.0.255

IRouter1-ospf-1-area-0.0.0.0] network 20.1.1.1 0.0.0.255

Router3:

[Router3] interface Serial 0/2/0

[Router3-Serial0/2/O] ip address 20.1.1.2 24

[Router3] interface loopback 0

[Router3-LoopBackO] ip address 3.3.3.3 32

[Router3] interface Tunnel 0

[Router3-TunnelO] source 20.1.1.2

[Router3-TunnelO] destination 1 0.1.1.1

[Router3-TunnelO] ip address 100.1.1.2

[Router3] ospf

[Router3-ospf-l] area 0

[Router3-ospf-l-area-0.0.0.0] network 20.1.1.2 0.0.0.255

[Router3] ip route-static l.1.1.1 32 100.1.1.1

Use the command ping-a 1.1.1.1 3.3.3.3 on Router 1 to check the connectivity, and 100% of the ICMP return packets are received.

In the above process, the following description of the processing process of data packets by each router is correct? (Multiple choice)

Router1 performs GRE encapsulation of ICMP Echo Request messages.

Router2 forwards IP packets

Router2 decapsulates the ICMP Echo Request message GRE

Router3 performs GRE encapsulation of ICMP Echo Reply messages.

25. The configuration command on the MSR router is as follows:

acl number 2003

rule 0 permit source 192.168.2.0 0.0.0.255

#

traffic classifier 1 operator and

if-match not acl 2003

#

traffic behavior 1 filter den

#

qos police 1

classifier 1behavior 1

#

interface GigabitEthernet0/1

port link-mode route

ip address 192.168.1.1 255.255.255.0

qos appl polic 1 outbound

Then when the packets with source addresses 192.168.2.2 and 192.168.0.2 are forwarded from port G0/1. Which of the following statement is correct? (Multiple choice)

Packets with source address 192.168.0.2 are forwarded normally

Packets with source address 192.168.2.2 are forwarded normally

The forwarding of packets with source address 192.168.0.2 is blocked

The forwarding of packets with source address 192.168.2.2 is blocked

26. AAA supports _____ billing method. (Multiple choice)

Local billing

No billing

TACACS Billing

RADIUS billing

27. Among the following VPN technologies, which belong to the second layer VPN? (Multiple choice)

VPLS

VLL

GRE VPN

IPSec VPN

28. Which of the following PPPoE messages are sent in broadcast form? (Multiple choice)

PADI （ PPPoE Active Discover Initiation ）

PADO （ PPPoE Active Discover Offer ）

PADR （ PPPoE Active Discover Request ）

PADS （ PPPoE Active Discover Session-Confirmation ）

PADT （ PPPoE Active Discover Terminate ）

29. Which of the following statements about WFQ is correct? (Multiple choice)

Different queues can only be allocated according to different DSCP priorities within the same group.

Different queues can only be allocated according to different IP priorities within the same group.

Different queues can only be allocated in the same group based on different IP priorities or DSCP priorities.

WRED can be used for congestion avoidance control

To configure the WFQ function, you need to configure the following command in the system view QoS wfq dscp queue-length 64 queue-number 64

30. In VoIP networks, the bandwidth saved by VAD technology has nothing to do with which of the following factors? (Multiple choice)

The encoding type selected

Network congestion level

Selected signaling type

Speaker’s language and characteristics

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31. In the BGP MPLS VPN network, the BGP neighbor between the two PEs has been successfully established, but the reason why the MP-BGP neighbor cannot be established may be?

The public network route between the two PEs is unreachable

The corresponding neighbor is not enabled in the BGP VPNv4 address family.

There is no VPN that needs to be communicated between the two PEs.

No MPLS public network tunnel is established between PEs

32. When establishing a BGP MPLS VPN network, which of the following parameters need to be planned by the user and configured on the device? (Multiple choice)

RT attributes

RD value

VPN name

VPN private network label value

33. For an 860MHz HFC network with one optical node covering 1,000 households, when the 64QAM modulation method is used, all the network bandwidth is used for point-to-point services. The average bandwidth per household is ____

7Mbps

5Mbps

3.5Mbps

12.5Mbps

10Mbps

34. Contents that need to be paid attention to in traffic management include? (Multiple choice)

How much traffic is on each link?

What is the proportion of bandwidth occupied by various applications at the egress?

What is the time distribution of traffic for each type of business in the network?

Peak and average values of various types of traffic in the network

35. The information displayed on the MSR router is as follows:

acl number 2000

rule 0 permit source 192.168.0.0 0.0.0.255

acl number 2002

rule 0 permit source 192.168.2.0 0.0.0.255

#

traffic classifier 2 operator and

if-match acl 2002

traffic classifier 1 operator and

if-match acl 2000

#

traffic behavior 2

queue of bandwidth per cent 30

traffic behavior 1

queue ef bandwidth pct 30 cbs-ratio 25

#

qos polic test

classifier 1 behavior 1

classifier 2 behavior 2

#

interface GigabitEthernet0/1

port link-mode route

duplex full

speed 10

qos reserved-bandwidth pct 100

ip address 192.168.1.1 255.255.255.0

qos appl polic test outbound

When the traffic rates of packets with source addresses 192.168.0.2, 192.168.2.2, and 192.168.3.2 are 4Mbps, 4Mbps, and 6Mbps respectively, and there is no other background traffic, they are forwarded from port G0/1. Then which of the following statement is incorrect? (Multiple choice)

The forwarding rate of packets with source address 192.168.0.2 is about 4Mbps

The forwarding rate of packets with source address 192.168.0.2 is about 3Mbps

The forwarding rate of packets with source address 192.168.0.2 is about 2.7Mbps

The forwarding rate of packets with source address 192.168.2.2 is about 4Mbps

The forwarding rate of packets with source address 192.168.2.2 is about 3Mbps

The packet forwarding rate with the source address 192.168.2.2 is about 2.7Mbps

36. Which of the following statements about RED random early detection is incorrect? (Multiple choice)

Drop after port congestion

When the average queue length is less than the minimum discard threshold, the packet will not be discarded.

The average queue length is greater than the minimum discard threshold, and incoming packets are randomly discarded.

When the average queue length is greater than the maximum discard threshold, incoming packets are randomly discarded.

The higher the priority of the message, the lower the probability of discarding it, which means that the less likely it is to be discarded.

37. During the ONU registration process, the MPCP control message sent through the unicast channel includes ____. (Multiple choice)

Ordinary GATE

Report

Register_Req

Register_Ack

Discover GATE

38. Which of the following statement about the symmetric encryption algorithm is correct? (Multiple choice)

Symmetric encryption algorithm is more efficient

Symmetric encryption algorithm is suitable for environments where large amounts of data are transmitted

Symmetric encryption algorithms include AES, 3DES, DES, etc.

The security of the symmetric encryption algorithm completely depends on the security of the key itself

39. Four routers R1, R2, R3 and R4 are connected in sequence. Loopback0 interfaces are created on R1 and R4. The interface addresses are 1.1.1.1 and 4.4.4.4 respectively. The four devices are configured with dynamic routing protocols respectively to ensure Loopback0 of R1 and R4. The address route is reachable. A GRE Tunnel is established between R1 and R4. Check the tunnel interface information on R1 as follows:

[R1] displa interface Tunnel 0

Tunnelo current state: UP

Line protocol current state: UP

Description: Tunnelo Interface

The Maximum Transmit Unit is 1476

Internet Address is 10.0.0.1/30 Primar

Encapsulation is TUNNEL ， aggregation ID not set

Tunnel source l.1.1.1 ， destination 4.4.4.4

Tunnel keepalive disable

Tunnel protocol/transport GRE/IP

GRE is disabled

Checksumming of GRE packets disabled

Last 300 seconds input: 2 btes/sec ， 0 packets/sec

Last 300 seconds output: 2 btes/sec ， 0 packets/sec

15 packets input ， 840 btes

0 input error

27 packets output ， 1248 btes

0 0utput error

At this time, if the link between R2 and R3 is interrupted, which of the following statement is correct? (Multiple choice)

The Tunnel interface on R1 remains U

Tunnel interface status DOWN on R1

The source IP of the tunnel interface of R4 is 1.1.1.1 and the destination IP is 4.4.4.4

The IP address of the tunnel interface of R4 should be 10.0.0.2

40. In a typical PPPoE network, both PPPoE Server and PPPoE Client are MSR routers. If you want PPPoE to work in permanent online mode, which of the following configurations need to be performed?

Configure on PPPoE Server: [RTA-virtual-Templatel] pppoe-client dial-bundle-number 1

Configure on the PPPoE Client: [HG-Dialer l] pppoe-client dial-bundle-number l

Configure on the PPPoE Client: [HG-Ethernet0/0] pppoe-client dial-bundle-number 1

Configure on the PPPoE-Server ： [RTA-Virtual-Templatel] pppoe-client dial-bundle-number l idle-timeout 65535

Configure on the PPPoE Server: [RTA- Ethernet0/0] pppoe-client dial-bundle-number 1

Configure on the PPPoE Client: [HG-Dialerl] pppoe-client dial-bundle-number l idle-timeout O

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41. According to the industry standard G/T 106-1999 "Technical Specifications for Cable TV Broadcasting System" of the People's Republic of China, the _____ band is used to transmit traditional analog TV programs, digital TV programs and VOD.

87MHz ～ 108MHz

0 ～ 30MHz

5 ～ 65MHz

110MHz ～ 1000MHz

42. In a VoIP network where calls are made through a gatekeeper, what will happen when the gatekeeper cannot determine the location information of the called terminal within its own jurisdiction?

Send a Location Request (LRQ) message to a gatekeeper it knows

Reply directly to the calling party with a Location Rejection (LRJ) message

Reply directly to the calling party with a permission rejection (ARJ) message

None of the above answers are correct

43. Regarding the defense against malformed packets, which of the following statement is correct? (Multiple choice)

The ping of death attack uses oversized packets to attack.

Teardrop attacks exploit the vulnerability of overlapping movements during UDP packet reassembly.

Malformed TCP message attacks are carried out by setting the TCP flag to a specific value.

To defend against malformed packet attacks, it is necessary to carry out targeted defense based on the characteristics of each attack.

44. In BGP MPLS VPN networking, in which of the following locations will the private network label exist? (Multiple choice)

In the private network packet forwarded by PE to P device

Private network routing between PEs

During the private network routing interaction between PE and CE

In the private network message forwarded by PE to CE

45. To obtain the best VoIP voice quality, _____ encoding is the best choice.

711

723

729

46. The methods of using logical isolation for business isolation include? (Multiple choice)

Establish an IPSec tunnel

Use SSL VPN

Set up MPLS-VPN network

Use a dedicated line

47. Which of the following levels does the SOA - based network architecture divide enterprise IT systems into? (Multiple choice)

Network layer

Session layer

Application layer

Infrastructure layer

48. Use the command on the MSR router:

dis qos wfq interface GigabitEthernet 0/1

Get the following information:

Interface: GigabitEthernet0/1

Output queue: （ Urgent queuing: Size/Length/Discards ） 0/100/0

Output queue: （ Protocol|queuing: Size/Length/Discards ） 0/500/0

Output queue: （ Weighted Fair queuing: Size/Length/Discarcds ） 1023/1024/52719

Hashed b DSCP

Hashed queues 1/2/64 （ Active/Max active/Total ）

which of the following statement is correct? (Multiple choice)

The port uses WFQ queue, and the weight type is DSCP

The port uses WFQ queue, and the weight type is IP priority.

The number of currently activated queues is 2

The maximum number of queues activated in history is 2

The maximum length of the queue is 1024. There is currently data congestion and packet loss.

49. Run the displa ike peer command on the device to display the following information. From this information, you can know? (Multiple choice)

KE Peer: 123

exchange mode: aggressive on phase 1// aggressive mode

pre-shared-ke simple 123

peer id tpe: name

peer ip address: 10.2.1.1

local ip address:

peer name: aaa // The name of the peer security gateway is aaa

nat traversal: enable

dpd:

In the first phase of IKE negotiation, the negotiation mode is the main mode.

During the first phase of IKE negotiation, the initiator sends its name to the peer to identify itself.

The name of the local security gateway during IKE negotiation is aaa

The local security gateway IP address is not configured. The local gateway IP address during IKE negotiation will use the primary IP address of the interface to which the security policy is applied.

50. Which of the following statement about the label switching (SWA) operation performed on the LSR device is correct? (Multiple choice)

When the packet arrives at the LSR, the MPLS label value carried in the packet is compared with the incoming label entry in the label forwarding table.

When the packet arrives at the LSR, compare the MPLS label value carried in the packet with the outgoing label entry in the label forwarding table.

When the packet arrives at the LSR, the MPLS label value carried in the packet is changed to the incoming label of the corresponding label forwarding entry.

When the packet arrives at the LSR, the MPLS label value carried in the packet is changed to the outgoing label of the corresponding label forwarding entry.

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51. Which of the following descriptions of GREVPN and BGP / MPLS VPN are correct?

Both address spaces can be separated.

They are all point-to-point tunnels

GREVPN does not separate address spaces, but BGP/MPLS VPN can separate address spaces.

GRE VPN can provide advanced security such as data encryption, but BGP/MPLS VPN cannot provide such security.

52. Among the following descriptions, the handshake layer functions of the SSL protocol include? (Multiple choice)

Responsible for establishing and maintaining SSL sessions

Ensure data transmission is reliable

Close SSL connection under abnormal circumstances

Negotiate key parameters used for encryption

53. Compared with IPsec VPN, which of the following advantages does SSL VPN have? (Multiple choice)

No client

Installation-free and maintenance-free client

Fast

Highly fine-grained access control

54. Which of the following statement about SSL VPN access control is correct? (Multiple choice)

Static authorization identity authentication includes two methods: local authentication and external authentication.

Dynamic authorization requires the creation of a security policy

Dynamic authorization requires the terminal to install the client program

Dynamic authorization and static authorization are two independent access control methods

55. Configure the following commands on the MSR router:

qos rtpq start port 16384end-port 32767bandwidth1000cbs25000

Which of the following statements is incorrect? (Multiple choice)

The device applies RTPQ queue

The configured start-port port number is the source port number, and the end-port port number is the destination port number.

start-por and end-port are configured with UDP port numbers

start-por and end-port are configured with TCP port numbers

56. In a typical PPPoE network, both PPPoE Server and PPPoE Client are MSR routers. If you want the PPPoE session to automatically disconnect after being idle for 3 minutes, which of the following configurations need to be performed?

Configuration on PPPoE Server ： [RTA-Virtual--Template1] pppoe-client dial-bundle-number l idle-timeout 180

Configuration on PPPoE Client: [HG-Dialerl] pppoe-client dial-bundle-number 1 idle-timeout 3

Configuration on PPPoE-Client: [HG-Dialerl] pppoe-client dial-bundle-number 1 idle-timeout 3

Configuration on PPPoE-Server: [RTA-Virttual-Template1] pppoe-client dial-bundle-number 1 idle-timeout 3

Configuration on PPPoE Server: [RTA-Ethernet0/0] pppoe-client dial-bundle-number 1 idle-timeout 180

Configure on the PPPoE Client: [HG-Ethernet0/0] pppoe-client dial-bundle-number 1 idle-timeout 180

57. Which of the following are symmetric key algorithms? (Multiple choice)

RSA

DSA

DES

AES

58. Configure the MSR router with the following commands:

acl number 2001

rule o permit source 192.168.2.0 0.0.0.255

acl number 2002

rule o permit source 192.168.3.0 0.0.0.255

acl number 2003

rule o permit source 192.168.0.0 0.0.0.255

#

traffic classifier 2 operator or

if-match acl 2001

if-match classifier 1

traffic classifier 1 operator and

if-match acl 2002

if-match acl 2003

#

traffic behavior 2

filter deny

#

police officer 2

classifier 2 behavior 2

#

interface GigabitEthernet0/1

port link-mode route

ip address 192.168.1.1 255.255.255.0

qos appl polic 2 0utbound

Then when the packets with source addresses 192.168.2.2, 192.168.3.2, and 192.168.0.2 are forwarded from port GO/1, which of the following statement below is correct? (Multiple choice)

Packets with source address 192.168.2.2 are forwarded normally

Packets with source address 192.168.3.2 are forwarded normally

Packets with source address 192.168.0.2 are forwarded normally

The packets of the three streams are blocked.

59. Which of the following part does not belong to the SSL/TSL specification?

handshake protocol

alert protocol

hello protocol

record protocol

60. Which of the following description of the Export Target attribute and Import Target attribute of RT is correct? (Multiple choice)

When the PE receives the MP-BGP route, it compares the RT attribute carried in the routing protocol with the Import Target attribute of the local VP

Only the one with intersection can be received into the VP

When the PE receives the MP-BGP route, it compares the RT attribute carried in the routing protocol with the Export Target attribute of the local VP

Only the ones that overlap can be received into the VP

When the private network route of the local VPN is published to the peer PE through the MP-BGP routing protocol, the BGP route needs to carry the Export Target attribute of the VP

When the private network route of the local VPN is published to the peer PE through the MP-BGP routing protocol, the BGP route needs to carry the Import Target attribute of the VP

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61. L2TP session information can be displayed through the ____ command.

display 12tp tunnel

display 12tp session

display 12tp status

display 12tp verbose

62. Regarding echo in VoIP phone systems, which of the following statements is incorrect? (Multiple choice)

Echo is divided into electrical echo and acoustic echo. The electrical echo in the traditional telephone system is mainly caused by the impedance mismatch between the second and fourth wires.

The voice gateway device itself does not bring new echoes, but because the IP network brings network delays, the echo delays are increased, causing echoes that were not felt before to become detectable in the VoIP network. Echoes of feeling.

The voice gateway device may introduce echo when performing analog-to-digital conversion, but the echo suppression function can be configured in the voice gateway to reduce this impact.

In VoIP networks, the echo is related to the choice of encoding. The encoding with a larger compression ratio will have a larger echo in the network.

63. In a BGP MPLS VPN network, which of the following functions must be supported by ordinary CE equipment?

MPLS

MPLS LDP

MP-BGP

Multiple instances of routing protocols

All the above are wrong

64. The configuration command on the MSR router is as follows: acl number 2001

rule 0 permit source 192.168.2.0 0.0.0.255 acl number 2002

rule 0 permit source 192.168.3.0 0.0.0.255 acl number 2003

rule 0 permit source 192.168.0.0 0.0.0.255

#

traffic classifier 2 operator or if-match acl 2001

if-match acl 2002 if-match acl 2003

#

traffic behavior 2 filter deny

#

qos policy 2

classifier 2 behavior 2

#

interface GigabitEthernet0/1 port link-mode route

ip address 192.168.1.1 255.255.255.0

qos apply policy 2 outbound

Then when the packets with source addresses 192.168.2.2, 192.168.3.2, and 192.168.0.2 are forwarded from port G0/1, which of the following statement is correct? (Multiple choice)

The forwarding of packets with source address 192.168.2.2 is blocked

Packets with source address 192.168.2.2 are forwarded normally

Packets with source address 192.168.0.2 are forwarded normally

The packets of the three streams are blocked.

65. Configure the following commands on the MSR router:

qos cql 1 queue 1 serving 1000

qos cql 1 queue 2 serving 2000

qos cql 1 queue 3 serving 500

qos cql 1 queue 4 serving 1500

qos cql 1 protocol ip tcp ftp-data queue 2

qos cql 1 protocol ip udp tftp queue 3

qos cql 1 protocol ip pop3 queue 4

#

interface GigabitEthernet0/1

port link-mode route

ip address 192.168.1.1 255.255.255.0

duplex full

speed 10

qos cq pql 1

The traffic forwarded from G0/1 includes Telnet, FTPData, TFTP and POP3 traffic, all of which are 4Mbps. If there is no other traffic on the port, the approximate bandwidth that Telnet packets can use is

20%

40%

10%

30%

Configuration error

66. Among the control messages defined by the MPCP protocol, the one sent by the ONU is _____. (Multiple choice)

GATE

Report

Register_Req

67. xz Company requires building its network based on a modular enterprise network architecture. Company Z has one R&D base in Shenzhen and Xi'an, and one office building in Beijing and Shanghai; it has offices with more than 50 people in 23 provincial capital cities; it has small offices with no more than 8 people in 200 small and medium-sized cities. There are typically over 200 marketing and technical staff traveling at any given time. Due to environmental and cost issues, some offices are unable to connect to the headquarters via dedicated lines or packet-switched WAN connections. According to these circumstances, the network module that Company Z should have ____. (Multiple choice)

Large branch network

Dedicated line / packet switching access

Remote / distributed office network

VPN access

68. Which of the following about symmetric encryption algorithms? (Multiple choice)

RAS

RC4

AES

DES

69. The theoretical transmission rate of ADSL data is related to which of the following options? (Multiple choice)

Line activation negotiation results

Number of sub-bearer channels

Modulation rate

Sub-bearer channel rate

70. The information displayed on the MSR router is as follows:

Sstem Defined Behavior Information:

Behavior: ef

Expedited Forwarding:

Bandwidth 20 （ % ） Cbs-ratio 25

Behavior: off

Assured Forwarding:

Bandwidth 20 （ % ）

Discard Method: Tail

Behavior: be

-none-

Then which of the following statement is correct? (Multiple choice)

The information displayed is the behavior defined by the system

The information displayed is user-defined behavior

EF queue and AF queue are defined, and the occupied bandwidth is 20% of the reserved bandwidth respectively.

Users can modify the percentage of bandwidth occupied by the queue in this behavior

Page 8 of 13

71. Among the following broadband access transmission media, those that are more suitable for covering remote areas without traditional communication lines include? (Multiple choice)

Coaxial cable

Copper twisted pair

Radio waves

Optical fiber

Power lines

72. Configure the following commands on the S3610 switch:

qos map-table dotlp-ip

import 1 export4

import 2 export 5

interface Ethernet1/0/8

port link-mode bridge

port link-tpe trunk

port trunk permit vlan 1 4

qos trust dotlp

interface Ethernet1/0/9

port link-mode bridge

port link-tpe trunk

port trunk permit vlan 1 4

qos gts an cir 65000 cbs 2000000

Then when the traffic is 40Mbps, the packets with vlan id 4 and 802.1p priority 1, and the traffic 40Mbps, the packets with vlan id 4 and 802.1p priority 2 enter from port E 1/0/8 at the same time, when forwarding from port E1/0/9, which of the following statement is correct? (Multiple choice)

80Mbps packets are forwarded normally

Packet traffic shaping is forwarded to 65Mbps

802.1p packets with priority 1 are lost on egress port E1/0/9

All 802.1p packets with priority 1 are forwarded on port E1/0/9.

802.1p priority 2 packets are lost on egress port E1/0/9

All 802.1p priority 2 packets are forwarded on egress port E1/0/9

Some configurations are incorrect

73. Configure the following commands on the MSR router:

qos rtpq start port 16384 end-port 32767bandwidth1000cbs25000

Which of the following statements is correct? (Multiple choice)

The device applies RTPQ queue

The configured start-port port number is the source port number, and the end-port port number is the destination port number.

start-por and end-port are configured with UDP port numbers

start-por and end-port are configured with TCP port numbers

74. Among the control messages defined by the MPCP protocol, the ones sent by the ONU are? (Multiple choice)

GATE

Report

Reporter Req

Report

Reporter Ack

75. The cable used in the 1000BASE-LX standard of Ethernet is _______ and the maximum transmission distance is ______.

2 pairs of Category 5 UTP twisted pairs, 100m

Multimode optical fiber, 550m

4 pairs of Category 3 UTP twisted pairs, 100m

Single mode optical fiber, 5000m

4 pairs of Category 5 UTP twisted pairs, 100m

2 pairs of STP twisted pairs, 25m

76. The configuration command on the MSR router is as follows:

acl number 2001

rule 0 permit source 192.168.2.0 0.0.0.255

acl number 2002

rule 0 permit source 192.168.3.0 0.0.0.255

acl number 2003

rule 0 permit source 192.168.0.0 0.0.0.255

#

traffic classifier 2 operator and

if-match acl 2001

if-match acl 2002

if-match acl 2003

#

traffic behavior 2 filter den

#

police officer 2

classifier 2 behavior 2

#

interface GigabitEthernet0/1

port link-mode route

ip address 192.168.1.1 255.255.255.0

qos appl polic 2 outbound

Then when the packets with source addresses 192.168.2.2, 192.168.3.2, and 192.168.0.2 are forwarded from port G0/1, which of the following statement is correct? (Multiple choice)

Packets with source address 192.168.2.2 are forwarded normally

Packets with source address 192.168.3.2 are forwarded normally

The forwarding of packets with source address 192.168.0.2 is blocked

The packets of the three streams are blocked.

77. Which of the following statements about the client, LAC and LNS in L2TP is correct? (Multiple choice)

The client can serve as LNS at the same time

A LAC can establish connections with multiple LNS at the same time

The client can also serve as a LAC

LAC can serve as LNS at the same time

78. The following command is configured on an interface of the router:

qos car inbound any cir 1000 cbs 62500 ebs 0 green remark-dscp-pass ef red remark-dscp-continue af13

Then when the port receives a packet, which of the following statement is correct? (Multiple choice)

When the received packet rate is less than 1000kbps, the packet is forwarded normally without any processing.

When the received packet rate is less than 1000kbps, the DSCP value of the packet is marked as EF and then forwarded

When the received packet rate is less than 1000kbps, after the DSCP value of the packet is marked as EF, it will be forwarded to the next CAR policy.

When the received packet rate is less than 1000kbps, it can burst 62500 bytes. The DSCP value of packets exceeding 1000kbps is marked as af13 and forwarded directly.

When the received packet rate is greater than 1000kbps, a burst of 62500 bytes can be made. The DSCP value of the packet exceeding 1000kbps is marked as AF13, and the next CAR policy is directly processed.

79. In the process from digital certificate application to invalidation, the functions of each component of PKI (Public Key Infrastructure, public key system) are? (Multiple choice)

When an entity wishes to obtain a digital certificate, it first applies to the RA (Registration Authority). After RA reviews the entity's identity, it sends the entity's identity information and public key to the CA (Certificate Authority) in the form of a digital signature.

After the CA verifies the digital signature, it agrees to the entity's application and issues a certificate to the entity.

The CA sends the issued certificate to the LDAP server to provide directory browsing services

When an entity wishes to revoke a certificate, it submits an application to RA (Registration Authority)

80. To clear the established IPSec security association, which of the following commands should be used?

reset ipsec

reset ipsec polic

reset ipsec to

reset ike to

Page 9 of 13

81. Recommended equipment security hardening methods include? (Multiple choice)

Use public as the network administrator access community word

Set login user permissions hierarchically

Set all IP addresses to log in to the device

Close FTP and other services

82. When the queue length reaches the maximum value, the packet will be discarded using _____ method

Tail discard

RED

WRED

In chronological order, discard the first packet that enters the queue.

83. Which of the following information about the private network route learned from the remote end through the MP-BGP protocol will be recorded by the PE? (Multiple choice)

The RT Import Target attribute of the private network route

The private network label of the private network route

The RD value of the private network route

84. Which of the following description about MPLS lsr-id is correct? (Multiple choice)

lsr-id is used to identify an LSR device in the MPLS network

The format of lsr-id is the same as the IP address

lsr-id is unique in the MPLS network

lsr-id must be configured to be the same as the Router ID of the LSR

85. Which of the following statements about EPCN is correct? (Multiple choice)

EPCN is a passive EoC technology, the user terminal is a passive device, and the system transmission loss tolerance is low, which limits its application scope to a certain extent.

EPCN is an active EoC technology, and user terminals are active devices, thus avoiding the limitations of network topology without passive EoC technology.

The EPCN system mainly deploys the coaxial distribution network part of the cable TV network, and mainly uses EPON technology to cooperate with it on the HFC backbone network.

EPCN complies with HFC- based broadband access specifications such as DOCSIS l.0/1.1/2.013.0.

86. After a process of the OSPF protocol is bound to a VPN, ______ will appear. (Multiple choice)

The routes learned by the OSPF process only exist in the routing table of the VP

The OSPF process can only establish OSPF neighbors with CE devices with the same OSPF process number as it.

The routes learned by the OSPF process will exist in the public network routing table

The OSPF process can only establish OSPF neighbors with CE devices connected to the interface bound to the VP

87. Capture messages between two remote routers and find that the data packets consist of IP headers, ESP headers and encrypted data.

Then the data packet may go through which of the following processes? (Multiple choice)

GRE overIPSec, IPSec uses transport mode

GRE overIPSec, IPSec adopts tunnel mode

IPSec over GRE, IPSec uses transport mode

IPSec over GRE, IPSec adopts tunnel mode

88. Configure the following commands on the MSR router:

qos pql 1 protocol-ip-tcp1000 queue-top

qos pql 1 protocol-ip-tcp1001 queue-middle

qos pql 1 protocol-ip-tcp1002 queue- normal

qos pql 1 protocol-ip-tcp1003 queue-bottom

#

interface GigabitEthernet0/1

port link-mode route

ip address 192.168.1.1 255.255.255.0

qos lr outbound cir 10000 cbs 625000 ebs 0

qos pq pql 1

qos rtpq start-port 16384 end-port 32767 bandwidth 1000 cbs 25000

Then when the TCP packets with destination ports 1000, 1001, 1002 and 1003 respectively and the traffic matching RTPQ enter the MSR at a speed of 4Mbps and are forwarded from port G0/1, Which of the following statement is correct? (Multiple choice)

The forwarding rate of TCP packets with destination port 1000 is 3Mbps

The forwarding rate of TCP packets with destination port 1001 is 4Mbps

The forwarding rate of TCP packets with destination port 1002 is 2.4Mbps

The forwarding rate of TCP packets with destination port 1003 is 0

RTPQ traffic packet forwarding rate is approximately 1Mbps

89. Among the following DSL technologies, which one with the highest transmission rate?

ADSL

ADSL2+

VDSL

SHDSL

HDSL

90. Which of the following are asymmetric key algorithms? (Multiple choice)

RSA

DSA

DES

Page 10 of 13

91. 802.1p CoS divides ______ service levels.

92. Which of the following statements about DOS attacks are correct? (Multiple choice)

DOS attacks aim to reduce the service provision capability of the attacked system.

For TCP FLOOD attacks in DOS attacks, the TCP proxy mechanism can be used to defend against them.

For FTP FLOOD attacks in DOS attacks, you can limit the number of connections per second for defense.

For DOS attacks, you can prevent it by configuring the corresponding access control list on the network device.

93. The advantages of the hierarchical network model include___. (Multiple choice)

Enhance network scalability

Improve network throughput

Reduce end-to-end delay

Facilitate network maintenance

94. Which of the following descriptions include that do not belong to the handshake layer functions of the SSL protocol? (Multiple choice)

Responsible for establishing and maintaining SSL sessions

Ensure data transmission is reliable

Close SSL connection under abnormal circumstances

Verify data integrity

95. The configuration command on the MSR router is as follows:

acl number 2001

rule 0 permit source 192.168.2.0 0.0.0.2

acl number 2002

rule 0 permit source 192.168.3.0 0.0.0.2

acl number 2003

rule 0 permit source 192.168.0.0 0.0.0.2

#

traffic classifier 2 operator and

if-match acl 2001

if-match acl 2002

if-match acl 2003

#

traffic behavior 2 filter deny

#

police officer 2

classifier 2 behavior 2

#

interface GigabitEthernet0/1 port link-mode route

ip address 192.168.1.1 255.255.255.0

qos appl polic 2 outbound

Then when the packets with source addresses 192.168.2.2, 192.168.3.2 1, and 92.168.0.2 are forwarded from port G0/1, which of the following statement is correct? (Multiple choice)

The forwarding of packets with source address 192.168.2.2 is blocked

Packets with source address 192.168.2.2 are forwarded normally

Packets with source address 192.168.0.2 are forwarded normally

The packets of the three streams are blocked.

96. The following functions of the aggregation layer are ____.

Has a large number of interfaces for connecting to end-user computers

Access security control

High-speed packet switching

Complex routing strategy

97. M On a public network device in the BGP MPLS VPN network, when using the displa mpls ldp lsp command to check its label forwarding table, the results are as follows, indicating ______. (Multiple choice)

[PE1] dis mpls ldp lsp

LDP LSP Information

-------------------------------------------------- -----------------------

SN DestAddress/Mask In/OutLabel Next-Hop In/Out-Interface

-------------------------------------------------- ----------------------------------

1.1.1.1/32 is the local interface address of PE1. All outgoing labels are NULL and incoming labels are 3.

1.1.1.3/32 is the local interface address of PE1. All outgoing labels are NULL and the outgoing label is 3.

1.1.1.2/32 is the public network device interface address directly connected to PE1, so the output label is 1024

1.1.1.3/32 is the public network device interface address directly connected to PE1, so the output label is 3

98. Which of the following statements about GRE and BGP MPLS VPN are correct? (Multiple choice)

They are all VPN technologies

They all use tunnelable technology to implement VPN

The GRE tunnel requires static configuration to be established, while the MPLS tunnel of BGP MPLS VPN is dynamically established.

Only static routing protocols can be run between GRE private network users, and BGP dynamic routing protocols can be run between BGP MPLS VPN private network users.

99. Among the following options, the one that belongs to CPE is ___. (Multiple choice)

Access switch

Access the server

Broadband Router / Modem

DSLAM

Set -top box

cable modem

100. Configure the following commands on the S3610 switch:

qos map-table dot1p-lp

import 1 export 5

import 2 export 4

interface Ethernet1/0/8

port link-mode bridge

port link-tpe trunk

port trunk permit vlan 1 4

qos trust dot1p

interface Ethernet1/0/9

port link-mode bridge

port link-tpe trunk

port trunk permit vlan 1 4

qos gts an cir 65000 cbs 2000000

Then when the traffic is 40Mbps, the packets with vlan id 4 and 802.1p priority 1, and the traffic 40Mbps, the packets with vlan id 4 and 802.1p priority 2 enter from port E1 / 0 / 8 at the same time. When forwarding from port E1/0/9, which of the following is correct? (Multiple choice)

80Mbps packets are forwarded normally

Message traffic shaping is forwarded to 65kbps

802.1p priority 1 packets are lost on egress port E1/0/9

All 802.1p priority 1 packets are forwarded on egress port E1/0/9

802.1p priority 2 packets are lost on egress port E1/0/9

All 802.1p priority 2 packets are forwarded on egress port E1/0/9

Some configurations are incorrect

Page 11 of 13

101. According to different network levels, VPN can be divided into which of the following types? (Multiple choice)

Intranet VPN

Internet VPN

Layer2 VPN

Layer3 VPN

102. Which of the following statement about VPNv4 addresses is correct? (Multiple choice)

VPNv4 addresses have an additional RD prefix compared to IPv4 addresses.

VPNv4 address length is 96 bits

In BGP MPLS VPN networking, the destination address of packets forwarded on the public network is the VPNv4 address.

VPNv4 address will not appear in user data packets

103. Which of the following descriptions about L2TP VPN and SSL VPN is correct? (Multiple choice)

All need to install and maintain the client

All support Web access methods

All support IP access methods

They are all based on UDP encapsulation

104. An H.323 gateway received an RCF message when registering with the gatekeeper, indicating that?

The gatekeeper accepted the registration of the gateway

The gatekeeper rejected the registration of the gateway

The parameters transmitted by the gateway are incorrect

The gatekeeper is processing the gateway’s registration request

105. Four routers R1, R2, R3 and R4 are connected in sequence. Loopback0 interfaces are created on R1 and R4. The interface addresses are 1.1.1.1 and 4.4.4.4 respectively. The four devices are configured with static routing protocols respectively to ensure Loopback0 of R1 and R4. The address route is reachable. A GRE Tunnel is established between R1 and R4. Check the tunnel interface information on R1 as follows:

[R1] displa interface Tunnel 0

Tunnelo current state: UP

Tunnelo current statle: UP

Line protocol current state: UP

Description: Tunnel 0 Interface

The Maximum transmit Unit is 1476

Internet Addess is 10.1.1.1/30 Primar.

Encapsulation isTUNNEL aggregation ID not set

Tunnel source l.1.1.1 destination 4.4.4.4

Tunnel keeepalive disable

Tunnel protocol/transport GRE/IP.

GRE key disable

Checksumming of GRE packets disabled

Last 300 seconds input: 2 btes/secl 0 packet/sec.

Last 300 seconds output: 2 bytes/sec ， O packets/sec .

15packets input 840bytes.

0 input error

27packets output ， 1248btes

0 0utput error

At this time, if the link between R2 and R3 is interrupted, which of the following statement correct? (Multiple choice)

The Tunnel interface on R1 remains U

Tunnel interface status DOWN on R1

The IP address of the tunnel interface of R4 should be 10.0.0.2

The source IP of the tunnel interface of R4 is 4.4.4.4 and the destination IP is 1.1.1.1

106. Which of the following statements about VLAN planning in EPCN networks is correct? (Multiple choice)

The PSPV method uses the same VLAN to tag all services of the same user, and the service quality cannot be guaranteed.

In PUPV mode, all users in the community share the same service vlan id.

PUPSPV mode can accurately identify users and services. Each service of each user has a corresponding vlan id identification.

The deployment of PUPSPV mode requires the device to support QinQ technology.

107. Traffic shaping usually uses ______ to make the traffic output to the downstream network comply with certain restriction standards, and to make the output traffic less volatile and smoother. (Multiple choice)

Buffer

Queue adjustment

Message compression

Token bucket

108. The configuration command on the MSR router is as follows:

acl number 2001

rule 0 permit source 192.168.2.0 0.0.0.255

acl number 2002

rule 0 permit source 192.168.3.0 0.0.0.255

acl number 2003

rule 0 permit source 192.168.0.0 0.0.0.255

#

traffic classifier 2 operator and

if-match acl 2001

if-match acl 2002

if-match acl 2003

#

traffic behavior 2

filter it

#

police officer 2

classifier 2 behavior 2

#

interface GigabitEthernet0/1

port link-mode route

ip address 192.168.1.1 255.255.255.0

qos appl polic 2 outbound

Then when the packets with source addresses 192.168.2.2, 192.168.3.2, and 192.168.0.2 are forwarded from port G0/1, which of the following statements is incorrect? (Multiple choice)

The forwarding of packets with source address 192.168.2.2 is blocked

Packets with source address 192.168.3.2 are forwarded normally

Packets with source address 192.168.0.2 are forwarded normally

The packets of the three streams are blocked.

109. In BGP MPLS VPN networking, in which of the following locations does the RT value exist?

In the private network packet forwarded by PE to P device

In routing update messages exchanged between PEs

In the route withdrawal messages exchanged between PEs

In the private network message forwarded by PE to CE

110. Which of the following components does the DiffServ model consist of? (Multiple choice)

DS （ Differentiated Service Domain ）

DS Boundar Nodes

DS Interior Nodes

Boundary links and internal links

Non- DS domain

DS （ Differentiated Service Region ）

Page 12 of 13

111. Configure the following commands on the S3610 switch:

qos map-table dot1p-lp

import 1 export 4

import 2 export 5

interface Ethernet1/0/8

port link-mode bridge

port link-tpe trunk

port trunk permit vlan 1 4

qos trust dot1p

interface Ethernet1/0/9

port link-mode bridge

port link-tpe trunk

port trunk permit vlan 1 4

qos gts an cir 65000 cbs 2000000

Then when the traffic is 40Mbps, the packets with vlan id 4 and 802.1p priority 1, and the traffic 40Mbps, the packets with vlan id 4 and 802.1p priority 2 enter from port E1 / 0 / 8 at the same time. When forwarding from port E1/0/9, which of the following is correct? (Multiple choice)

80Mbps packets are forwarded normally

Message traffic shaping is forwarded to 65kbps

All 802.1p priority 1 packets are forwarded on egress port E1/0/9

All 802.1p priority 2 packets are forwarded on egress port E1/0/9

Both 802.1p priority 1 packets and 802.1p priority 2 packets are lost on egress port E1/0/9, and the ratio of forwarded traffic is 5:4.

Some configurations are incorrect

112. The information displayed on the MSR router is as follows:

Sstem Defined Behavior

Information: Behavior: ef

Expedited Forwarding:

Bandwidth 20 （ % ）

Cbs-ratio 25

Behavior: off

Assured Forwarding:

Bandwidth 20 （ % ）

Discard Method: Tail

Behavior: be

-none-

Which of the following statements is incorrect? (Multiple choice)

The information displayed is the behavior defined by the system

The information displayed is user-defined behavior

EF queue and AF queue are defined, and the occupied bandwidth is 20% of the reserved bandwidth respectively.

Users can modify the percentage of bandwidth occupied by the queue in this behavior

113. The information displayed on the MSR router is as follows:

acl number 2000

rule 0 permit source 192.168.0.0 0.0.0.255

acl number 2002

rule 0 permit source 192.168.2.0 0.0.0.255

#

traffic classifier 2 operator and

if-match acl 2002

traffic classifier 1 operator and

if-match acl 2000

#

traffic behavior 2

queue of bandwidth per cent 30

traffic behavior 1

queue ef bandwidth pct 30 cbs-ratio 25

#

qos polic test

classifier 1 behavior 1

classifier 2 behavior 2

#

interface GigabitEthernet0/1

port link-mode route

duplex full

speed 10

ip address 192.168.1.1 255.255.255.0

qos appl polic test outbound

When the traffic rates of packets with source addresses 192.168.0.2, 192.168.2.2, and 192.168.3.2 are 4Mbps, 4Mbps, and 6Mbps respectively, and there is no other background traffic, they are forwarded from port G0/1. Which of the following statement is correct? (Multiple choice)

The forwarding rate of packets with source address 192.168.0.2 is about 4Mbps

The forwarding rate of packets with source address 192.168.0.2 is about 3Mbps

The forwarding rate of packets with the source address 192.168.0.2 is approximately 2.4Mbps

The forwarding rate of packets with source address 192.168.2.2 is about 4Mbps

The forwarding rate of packets with source address 192.168.2.2 is about 3Mbps

The forwarding rate of packets with the source address 192.168.2.2 is approximately 2.4Mbps

114. The ZLB (Zero-Length Bod) message is a control message with only an L2TP header. Its function is to serve as a clear response to ensure reliable delivery of the control message.

Among the following four situations, the LNS does not send a ZLB message to the LAC as a response?

After LNS receives the CDN (Call-Disconnect-Notif, call disconnect notification) message sent by LAC

After LNs receive the ICCN (Incoming-Call-Connectea , call connected) message sent by LAC

After LNS receives the Hello control message sent by LAC

LNS receives the StopCCN (scop-Control-Connection-Notiflcation) message sent by LAC; after the message

115. The main functions of LNS and LAC in the L2TP component are? (Multiple choice)

The LAC encapsulates the packets received from the remote system through L2TP and sends them to the LN

L2TP tunnels are mainly maintained by LAC

LAC and LNS can be the same device

LAC and LNS are the endpoints of the L2TP session

116. A secure network must meet ______ conditions. (Multiple choice)

Ensure that users accessing the network are legal and safe

Have an adequate security system when accessing the Internet

Have adequate encryption and anti-counterfeiting means when transmitting data on the Internet

The entire network has a complete management system

117. In BGP MPLS VPN networking, which of the following locations will the RD prefix exist? (Multiple choice)

In the private network packet forwarded by PE to P device

In routing update messages exchanged between PEs

In the route withdrawal messages exchanged between PEs

In the private network message forwarded by PE to CE

118. Which of the following service models are usually included in QoS? (Multiple choice)

Best Effort

FIFO （ First Input First Output ）

DiffServ （ Differentiated Service ）

IntServ （ Integrated Service ）

119. Which of the following statement about the operation process of SSL VPN is correct? (Multiple choice)

SSL VPN consists of remote host, SSL VPN gateway and intranet resource server

SSL VPN domain administrator has the highest administrative rights

Domain administrator creates local users, user groups, resources, and resource groups for the domain

After the user logs in, the VPN gateway terminates the SSL connection and determines the network resources the user accesses based on the configured user permissions.

120. Which of the following description of the relationship between RT and RD is wrong? (Multiple choice)

The RT value of the same VPN must be the same as the RD value

The RD value is one of the Import Target attribute or Export Target attribute list of the RT attribute of the VPN to which it belongs.

The RD values and RT attribute values of different VPNs on the same device cannot be configured to be the same.

Page 13 of 13

121. In theH.323 call process, if two terminals registered to the same gatekeeper adopt direct call mode, then? (Multiple choice)

Messages such as ARQ and ACF are exchanged directly between the two terminals

Messages such as Setup and Connect are exchanged directly between the two terminals. CH245 capability negotiation is completed directly between two terminals

None of the above answers are correct

122. EPON ranging and delay compensation technology are the keys to uplink channel multiplexing, which are mainly realized through the _____ processing process defined by MPCP. (Multiple choice)

Discovery Processing

Registration Processing

Report Processing

Gate Processing

123. Among the following ADSL standards, the one which does not require the use of a splitter? (Multiple choice)

ITU 992.1

ITU 992.2

ITU 992.3

ITU 992.4

124. Which of the following statements about PKI workflow are correct? (Multiple choice)

Certificate application is submitted by the entity

Entity identity review is completed by RA

The certificate is issued by CA

Entities need to apply to RA for certificate revocation

125. The calling UA sends a request message and receives a 200 OK response from the called UA. How does the calling UA cancel the request?

Immediately send a Cancel message to the called UA

Immediately send a BE message to the called UA

Immediately send a Back message to the called UA

Unable to revoke the request just now

126. XZ Company requires building its network based on a modular enterprise network architecture. Company Z has one R&D base each in Shenzhen and Xi'an; one office building each in Beijing and Shanghai; offices with more than 50 people in 23 provincial capital cities; small offices with no more than 8 people in 200 small and medium-sized cities; There are usually more than 200 marketing and technical personnel on the road at any time, and some of them are often located in areas lacking Internet access and can only connect to the headquarters through dial-up telephone networks. Due to environmental and cost issues, some offices are unable to connect to the headquarters via dedicated lines or packet-switched WAN connections.

According to these circumstances, the network module that Company Z should have _____. (Multiple choice)

Dial-up access

Secure Authentication

VPN access

Large branch network

127. During the ONU registration process, the MPCP control message sent through the broadcast channel includes _____ (Multiple choice)

Ordinary GATE

Report

Register_Req

Discover GATE

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2023 H3C GB0-391-ENU Exam Dumps Questions

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