Advance Your Career by Using Online H31-311_V2.5-ENU Dumps

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May 13, 2023

Obtaining the HCNA-Transmission H31-311_V2.5-ENU certification can help you demonstrate your expertise in Huawei solutions and advance your career in related industry. Using H31-311_V2.5-ENU dumps as part of your study plan can help you identify knowledge gaps, improve your exam-taking skills, provide immediate feedback, and increase your chances of passing the H31-311_V2.5-ENU exam. Huawei H31-311_V2.5-ENU exam free dumps questions are available below.

Page 1 of 15

1. The bits in the S1 byte indicate the clock quality level. Which side below indicates the highest clock quality level?

S1=00010100

S1=00100010

S1=00100100

S1=00001111

2. Which of the following aspects are the main advantages of SDH? (Multiple choices)

Interface specification

Synchronous multiplexing

OAM is powerful

Strong compatibility

Large capacity

3. Mapping is a process of adapting tributary signals into ( ) at the SDH network boundary.

4. When the rate of the SNCP ring composed of four OptiXOSN2500 devices is 2.5Gbit/s, the service capacity of the network can carry ()2Mbit/s signals at most

504

1008

2016

4032

5. For the management unit pointer adjustment, when the rate of VC>AU, which of the following adjustments will occur in the device?

Positive adjustment

Negative adjustment

Zero adjustment

No adjustment

6. In the case of 1+1 linear MSP, which of the following switching modes does not require the APS protection protocol to be enabled? (Multiple choice)

Single-ended reply mode

Single-ended non-reply mode

Double-ended reply mode

Double-ended non-reply mode

7. The information payload area stores only the information payload.

True

False

8. The advantages of WDM mainly include the following. (Multiple choice)

Large capacity, " transparent" transmission of data

The system is easy to upgrade, and the existing investment can be protected to the greatest extent when upgrading

Can fully replace SDH equipment

Compatible with future all-optical switching networks

High networking flexibility, economy and reliability

9. Both OTUk and ODUkP support obtaining LOF and LOM information by detecting FAS and MFRS overhead .

True

False

10. MS-REI is transmitted from source to sink.

Indicates the number of bit errors detected by the receiver after receiving the MS signal.

1.4.5

2.4.5

1.3.5

2.3.5

Page 2 of 15

11. Which of the following refers to Optical module parameter L-64.1?

Transmission distance

Dispersion coefficient

Sending optical power

Received optical power

12. The RAMAN amplifier utilizes which of the non-linear effects?

Self-Phase Modulation

Dispersion

Raman scattering

Four-wave mixing

13. Regarding the B1 byte, which of the following statements are correct? (Multiple choice)

The B1 byte uses the BIP-8 check method

Descramble the signal and then check it

When the local end detects a bit error, it does not send a report back to the opposite end

Up to 8 error blocks can be verified

14. According to the calculation formula of OUTk signal rate: OTUk rate = 255/(239-k) xSTM -N frame rate , so the rate of OTU4 signal is 255/235 x 99 532800 kbit /s .

True

False

15. OTUk_UAS is the unavailable second of the optical transmission segment. The unavailable second refers to the severe errored second lasting for more than 10 seconds, and the unavailable time starts from the 11th second, but the 10 seconds of the severely errored second are also counted. Enter the unavailable time, when the severe errored second continues to disappear for more than 10 seconds, it will enter the available time from the 11th second, and the 10 seconds without serious errored seconds are also counted as available time.

True

False

16. Which of the following layers defines the protocols that control the network layer?

The protocols at this layer apply to logical links, which are end-to-end connections between two devices.

Network layer

Data Link Layer

Transport layer

Application layer

17. The current sparse wavelength division multiplexing system generally works in the band from 1271nm to 1611nm. Which of the following is the channel spacing?

10nm

5nm

20nm

18nm

18. When the J1 bytes do not match, report () an alarm and the service may be interrupted.

RS_TEM

LP_TEM

HP_TIM

HP_SLM

19. PDM uses a polarizing beam splitter to split the laser into two perpendicular directions: x and y.

TRUE

FALSE

20. Which of the following device domains can be managed by U2000? (Multiple choice)

Transportation equipment

Wireless devices

Data communication equipment

Access the device

Page 3 of 15

21. The OLT is connected to the switch through ( ), using the V5.2 interface protocol.

22. After the network sends a fiber cut, which of the following alarms does not appear when the 1+1 linear multiplex section protection is configured?

R_LOS

APS_INDI

MS_APS_INDI_EX

HP_LOM

23. The communication network is a system that interconnects geographically dispersed user terminal equipment to realize communication and information exchange, and is mainly composed of user equipment and transmission equipment.

TRUE

FALSE

24. HONET integrated service access network belongs to ( ) access mode.

25. OCh means use of electrical monitoring techniques.

TRUE

FALSE

26. The management scope of OMSn is the path from the input optical port on the multiplexer unit of the sending site to the output optical port on the demultiplexer unit of the receiving site, called the optical multiplex section (OMS) path.

TRUE

FALSE

27. Which of the following logical function blocks is used to generate an R-LOS alarm?

RST

MST

MSA

SPI

28. QinQ technology can be interpreted as 802.1Q in 802.1Q, in other words, a layer of 802.1Q label is added on top of the 802.1Q label , the outer layer is C-VLAN and the inner layer is S-VLAN , two bytes more than a normal 802.1Q frame .

True

False

29. Which of the following description for the OTUk frame format is wrong?

The OTUk frame format is a matrix of x4080 byte columns

The 1 to 16 bytes columns of the OTUk frame format are overhead bytes

The 17 to 3825 bytes column of the OTUk frame format is the payload data

The 3825 to 4080 bytes column of the OTUk frame format is the encoded data of FEC

30. Which of the following statements is incorrect.

In the connection model of MPLS VPN, the network is composed of the backbone network of the operator and each site of the user. The so-called VPN is the division of a site set, and a VPN corresponds to a set composed of several sites.

The network construction of MPLS VPN is completed by the service provider. In this network structure, the service provider provides VPN services to users, and users do not feel the existence of a public network, as if they have independent network resources.

For the backbone routers inside the backbone network of the service provider, that is, the routers that are not directly connected to the edge routers, they do not know the existence of the VPN, and are only responsible for data transmission within the backbone network.

All VPN construction, connection and management work is carried out on the backbone router.

Page 4 of 15

31. OCI stands for open connection indication, a signal sent downstream, indicating that the upstream management command in the connection function has opened the matrix connection, and the signal loss state detected at the terminal point may be related to the opened matrix.

TRUE

FALSE

32. On the network management system, the network element performance monitoring time is set to () minutes and () hours.

15, 12

15, 24

30, 12

30, 24

33. 1. FAS is the frame alignment overhead, the length is 6 bytes, and it is located in the 1st to 6th columns of the first row. The 1st to 3rd bytes are 3 OA1 bytes, and each OA1 is always "1111 0110", that is, 16 F6 in hexadecimal; the 4th to 6th bytes are 3 OA2 bytes, and each OA2 is always "0010 1000", that is, 28 in hexadecimal.

True

False

34. Which of the following is related to pointer adjustment?

clock

Speed

Expenses

Scrambling

35. EPL service exclusively uses ports and bandwidth, and different users may need to share resources.

Which of the following methods can be used to isolate user data?

VLAN ID

MPLS labels

QinQ technology

All of the above

36. Which of the following IP addresses is a Class C IP address?

C2.A8.D2.e1

10.110.192.111

10011010.01101110.10000000.01101111

127.0.0.1

37. The dispersion coefficient is the delay difference caused by the optical wavelength signal passing through the unit length of optical fiber in the unit wavelength interval, so which of the following is the unit of the dispersion coefficient?

ps/nm

ps/km

ps/nm.km

ps/km.nm

38. OTN electrical layer SM, PM, and TCMi overheads all contain a 1-byte BIP8 field, and the frame structure ranges they monitor are different.

TRUE

FALSE

39. In the OTN mapping path, the ODUk signal can only be obtained by mapping the OPUk signal at the same level .

True

False

40. 1000BaseSX adopts single-mode fiber, and uses light with a wavelength of 1300nm working window to transmit services.

True

False

Page 5 of 15

41. SP3D board supports 63 E1 services

TRUE

FALSE

42. Which of the following situations occurs, the ODUk_PM_DEG alarm will be reported on the network management?

ODU layer PM segment bit error limit, when the number of bit errors exceeds the specified bit error excess threshold

ODU layer PM segment error degradation, when the number of error codes exceeds the specified error degradation threshold

ODUk TCMn layer signal degradation, when the number of bit errors exceeds the specified error threshold

ODUk TCMn layer error limit exceeds the limit, when the number of error codes exceeds the specified error degradation threshold

43. NEA and NEB are adjacent NEs. Which of the following performance events are reported by the NEA if day 3 and lower order bit errors occur in the direction A>day and day 1082, B3 and lower order bit errors occur in the direction B>A? (Multiple choice)

RSBBE

RSFEBBE

MSBBE

MSFEBBE

HPBBE

HPFEBBE

44. Which of the following statements about OTN's optical layer interfaces OTM-n.m and OTM-nr.m are incorrect?

n indicates the number of wavelengths carried by the maximum capacity

m means rate. Value can be 1, 2 or 3

Indicates OTM without OSC function

OTM-nr_m with OSC signal is OTM-n_m

45. In terms of protection capability, which of the following topological structures has the strongest protection capability?

Linear topology

Star topology

Tree topology

Ring topology

Mesh topology

46. The communication network can be divided into local area network and wide area network according to the geographical scope it covers, and a metropolitan area network between the local area network and the wide area network. The wide area network is characterized by low delay, high data rate and reliable transmission.

True

False

47. If a bit error is detected in the B2 byte, the peer end will report the following alarm.

MS-AIS

RS-BBE

MS-FEBBE

MS-BBE

48. Which of the following layers of overhead belong to the electrical layer overhead of OTN? (Multiple choices)

OPUk

ODUk

OCh

OTUk

49. The clock unit can only access the external clock source through the external clock interface as the timing signal source of the system. Additionally, it can output a processed clock and provide a clock source for other devices that require timing.

TRUE

FALSE

50. One-way ring means that under normal network conditions, the routes of business sending and receiving are inconsistent. We call the business of separating routing as one-way business.

True

False

Page 6 of 15

51. If the OTUk layer overhead is damaged, the board may report OTUk_SM_AIS to indicate the abnormal situation.

True

False

52. Which of the following options are correct? (Multiple choice)

The SAToP encapsulation type processes the CES service by packaging the 32 time slots in the E1 frame as a whole and then transparently transmitting them to the peer end.

The CESoPSN protocol can identify the frame structure of TDM services. It does not need to transmit idle time slot channels, but only extracts useful time slots from the service flow and encapsulates them as PWE3 messages for transmission.

PCM30 frame format of E1 frame: Except that time slot 0 cannot carry voice as a synchronous time slot, time slot 16 also cannot carry voice because it needs to transmit channel-associated signaling.

PCM31 frame format of E1 frame: except that 16 time slots are used as synchronous time slots and cannot carry voice, it can also carry 31 channels of voice.

53. TTL, time to live, its function is mainly to limit the number of hops that IP data packets can pass through the router in the network, such as TTL=1, it means that the data packet can only be transmitted in its own LAN.

TRUE

FALSE

54. Which of the following statements about overhead bytes is incorrect?

A1 and A2 are framing bytes. These bytes are used to separate STM-1 frames in the signal stream

JO is the regenerator section trace byte. This byte is used to repeatedly send the segment access point identifier so that the receiving end can verify its continuous connection with the designated sending end

B1 is Bit Interleaved Parity-8 (BIP-8). This byte is used to monitor the regenerator part layer for bit errors

E1 and E2 are wired bytes. These bytes are used to provide voice channels for order line connections.

55. The difference between dispersion compensation fiber and ordinary fiber is that the dispersion compensation fiber has a negative dispersion coefficient at ().

1310nm

1550nm

800nm

1650nm

56. What are the following steps for low-speed services to be multiplexed into high-speed SDH services? (Multiple choice)

Mapping

Overhead Insertion

Positioning

Multiplexing

57. Which of the following is not a passive optical device? (Multiple choice)

Lasers

Optical switch

filter

Grating

Modulator

58. Which of the following network element forms completes the cross-multiplexing between branches and lines, between lines and lines, and service up and down?

ADM

REG

DXC

59. All bytes in the SDH frame structure will be scrambled.

True

False

60. In the case of SNCP, line boards selectively receive service. Therefore, SNCP can protect the service on the line.

TRUE

FALSE

Page 7 of 15

61. When carrying out Ethernet service transmission, which of the following encapsulation protocols is used for the mixed connection of equipment from different manufacturers?

PPP

HDLC

LAPS

GFP

62. Tunnel/ VC are two kinds of labels in MPLS, which of the following is the value range?

True

False

63. Which standard encapsulation protocols are defined in MSTP? (Multiple choice)

HDLC

ML-PPP

LAPS

GFP

64. In the OSN550, the CX plug contains a function board integrated system control and communication (SCC) unit cross-connect unit and clock unit. There are various types of function boards according to the functions and access functions provided by the OSN550.

TRUE

FALSE

65. Which of the following alarms did the peer report when a bit error was detected in the B2 byte?

MS-AIS

RS-BBE

MS-FEBBE

MS-BBE

66. Which of the following can be used as the central wavelength of the pump source in EDFA? (Multiple choice)

980nm

1510nm

1480nm

1310nm

67. The SCC board can generate an optical supervisory channel.

True

False

68. The switch receives a data frame, searches the MAC forwarding table according to the destination MAC address of the data frame, and the search result is one or a group of ports, and sends the data packet to the sending queue of the corresponding port according to the search result .

True

False

69. Which of following is the switching mode of 1:N linear multiplex section?

Single-ended recovery

Single-ended non-recovery

Double-ended recovery

Double-ended non-restorative

70. 1310nm and 1550nm transmission windows are low loss windows. In DWDM systems, only the 1550nm transmission window is used. Which of the following is the main reason?

The operating wavelength flatness region of the EDFA is included in this window

The nonlinear effect in the 1550nm wavelength region is very small

The 1550nm wavelength region is suitable for long-distance transmission

None of the above

Page 8 of 15

71. Which of the following is the database used by U2000 on PC/WIN2003?

Sybase

Microsoft SQL Server 2000

Foxpro

DB2

72. Which of the following descriptions of MPLS is incorrect? (Multiple choice)

MPLS: Multi-protocol Label Switching, a non-standardized routing and switching technology platform

P/PE: P (Provider) is the internal node of the MPLS network, and PE (Provider Edge) is the edge of the MPLS network c. The operation of PE->P is Egress, adding MPLS labels to client signals

The operation of P->P is Ingress, which exchanges MPLS labels

73. The half-duplex mode must have a collision detection and avoidance mechanism to avoid the situation where multiple devices seize the line at the same time. This mechanism is the so-called CSMA/CD, and the Chinese name is carrier sense multiple access/collision detection .

True

False

74. Which of the following is the procedure for multiplexing low-speed services into high-speed SDH services? (Multiple choice)

Mapping

Overhead insertion

Align

Multiplexing

75. Which of the following items does the MAC forwarding table contain? (Multiple choice)

IP address

MAC address

A port number or set of port numbers

If the VLAN is divided on the switch, it also includes the VLAN ID

76. Adjacent concatenation can be converted into virtual concatenation, but virtual concatenation cannot be converted into adjacent concatenation .

True

False

77. The "2" in the optical module parameter "L-64.2" indicates which of the following working windows?

880nm

1310nm

1550nm

1510nm

78. Which of the following is the adjustment unit of AU-PTR?

A byte

Two bytes

Three bytes

Four bytes

79. The MAC address of the computer network card is uniformly assigned to each manufacturer by the IETF, and is unique in the world.

True

False

80. Which of the following bridges are used to forward data according to the MAC address and VLANID carried in the data?

802.1a

802.1d

802.1q

802.11ab

Page 9 of 15

81. The VLAN domain can isolate the unicast packets of different users, and also isolate the broadcast packets of different VLAN.

True

False

82. The single-fiber bidirectional wavelength division multiplexing system uses only one optical fiber to realize simultaneous transmission of optical signals in two directions in one optical fiber, and the optical signals in the two directions should be arranged at different wavelengths.

True

False

83. Which of the following is the main structure of the WDM system with N-channel wavelength multiplexing? (Multiple choice)

Optical wavelength conversion unit

WDM unit

Optical amplification unit

Monitoring unit

Intersection unit

84. The process from C4 to VC4 in the multiplexing process is rate adaptation.

True

False

85. The 2Mbit/s signal is currently used the most. Which of the following steps are involved in the process of multiplexing the 2Mbit/s signal into the STM-N? (Multiple choice)

Rate adaptation

Join Pointer

Add segment overhead

Scrambling

86. Which of the following is not an advantage of using QinQ technology?

Solve the increasingly scarce public network VLAN ID resource problem

Provide a relatively simple Layer 2 VPN solution

Different services can be distinguished according to different levels of VLAN ID

Solve the problem of packet transmission delay

87. GFP-F (Frame-Mapped GFP) is a block-oriented data encoding (such as Fiber Channel, ESCON) processing mode.

True

False

88. MPLS is a label forwarding technology, which of the following was originally designed for?

Increase the utilization rate of IP addresses

Increase the forwarding speed of the router

Reduce network latency

Avoid broadcast storms

89. Which of the following is a functional unit that provides a high-speed signal interface and processes the corresponding signal?

Cross-connect unit

Auxiliary units

Tributary units

Line units

90. The encapsulation formats of TMD E1 service PWE3 mainly include SAToP mode and CESoPSN mode, the main difference is whether to perceive the structure of TDM signal and processing overhead.

True

False

Page 10 of 15

91. Which of the following bytes can be used for wired telephony between two REG devices?

E1 and E2

None of the above

92. Which of the following is not an advantage of WDM?

Super large capacity and transparent data transmission

Ease of upgrade and maximum protection of existing investments

Completely replace SDH equipment

Compatible with all optical switching networks in the future

93. Which of the following levels does the U2000 network management belong to?

Network level management system

Subnet level management system

Network element level management system

Management systems at the regional level

94. There are many types of optical wavelength division multiplexers. Which are the following types of optical wavelength division multiplexers? (Multiple choice)

Interference filter type

Grating type

Filter type

Arrayed waveguide grating (AWG) type

95. The most effective subnet mask for a point-to-point WAN link is 255.255.255.252 .

True

False

96. Only one TCM can be used at one site.

TRUE

FALSE

97. Use CLI to log in to the subrack, enter ( ) and press Enter to view the subrack number .

98. When setting the LCAS mode, please follow the following principles: 1 If the equipment at both ends is Huawei equipment, please set it to "standard mode" 2 If Huawei equipment is interconnected with third-party equipment, please use the mode supported by the third-party equipment Set interconnected devices to the same mode.

TRUE

FALSE

99. Which of the following statements about the U2000 license is incorrect?

Each license file corresponds to the equipment serial number (ESN) of a 2000 computer, so it can only be used on the corresponding computer

Official U2000 licenses vary by operating system platform. You must apply for a U2000 license based on a specific operating system

The U2000 license file is named in the format of "0Xdat"

Do not modify the license file. Otherwise, the license file will fail

100. The frame rates of STM-1, STM-4, STM-16, and STM-64 signals are all the same at 8000 frames per second.

True

False

Page 11 of 15

101. RU on node detects OTS_LOS alarm and inserts OTS_BDI alarm into node A when fiber between node and node B is open RU on node A reports OTS_BDI alarm ・ Line board on downstream node C reports OCh_SSF alarm.

TRUE

FALSE

102. When setting the VLAN tag value, all ports of the same device should be configured with the same VLAN ID.

True

False

103. The receiver performs a BIP8 check on the scrambled STM-16. If the BIP-8 check result is XORed, the value 10001100 of the B1 byte contained in the next STM-16 frame indicates that there is a ( ) bit error block in the STM-16 frame.

104. After TCM monitoring is enabled, when the upstream station detects a LOF alarm, it will insert the IAE, and the local station will report the ODU1_TCMn_IAES performance event.

True

False

105. Compared with the dense wavelength division (DWDM) system, the coarse wavelength division (CWDM) system provides a certain number of wavelengths and transmission distance within (kmkm), which greatly reduces the system cost and has strong flexibility.

100

200

106. Which of the following is not a condition for triggering multiplex section protection (MSP)?

MS-AIS signal detected

Inspection side to AU-AIS

R-LOS detected

R-LOF detected

107. G.707 multiplexing circuit diagram can only multiplex 2M34M140M signals into STM-N.

TRUE

FALSE

108. Which of the following are communication quality alerts? (Multiple choice)

Optical port loopback

User who has not logged in to the network element

New in NE communication

Optical signal loss

109. In OTN, which of the following maintenance signals is transmitted from the downstream station to the upstream station?

AIS

LCK

IAE

BDI

110. Which of the following statements about cross-connect board 1+1 protection are correct? (Multiple choice)

The source service board sends services to the active and standby cross-connect boards

After the service cross-connect is completed, the active and standby cross-connect boards send the data of the active cross-connect board to the receiving service board.

The receiving service board can only receive data from the active cross-connect board.

The buses of the two cross-connect modules work independently without interfering with each other.

A dual-bus system architecture indicates that the service board performs dual data feeds to the cross-connect side and selectively receives data on the cross-connect side.

Both cross-connect boards have the same configuration. The service board will selectively receive service from one of the

Page 12 of 15

111. When the PM segment of the ODUk generates seriously errored seconds, the network management will report the ODUk_PM_ES alarm.

True

False

112. Which of the following is the multiplexing method of SDH?

Flexible mapping

Asynchronous multiplexing

Flexible mapping and asynchronous multiplexing

Flexible mapping and synchronous multiplexing

113. Which of the following overheads does not belong to the ODUk overhead?

TCM

NJO

APS/PCC

114. Which of the following boards supports the QinQ function?

EFT8

EGT2

EMS4

EMR2

115. Which of the following is wrong about LCAS?

When some members fail, other members still transmit data normally; when the failed members are repaired, the bandwidth of the virtual concatenation group can be automatically restored

If the belt curtain of a certain VCTrunk is not suitable, you need to increase or decrease the belt curtain, and adjust the belt curtain through LCAS, you only need to increase or decrease the number of VCTrunk members to achieve a smooth upgrade of the belt curtain without interrupting the business

WTR_TIMR is the waiting recovery time, which refers to the waiting time to join the LCAS virtual concatenation group after the time slot shielded by LCAS changes from bad to good

Use SDH overhead bytes (K4 for high-order virtual concatenation, H4 for low-order virtual concatenation) to carry control information, and perform handshake operations between the source and sink

116. The unit of physical layer data in the OSI reference model is (), and the unit of data link layer data is ().

117. The SDH frame structure is a rectangular block frame with which of the following options as the unit?

bytes

bit c. block

frame

118. For SDH equipment, in the frame structure of STM-N , the rate corresponding to each bit is () b/s.

119. During service configuration, there are two slot modes. Huawei uses the staggered slot mode by default.

TRUE

FALSE

120. When the U2000 is synchronizing, the same network element data as the U2000 will not be uploaded to the U2000, and the data that exists on the 2000 but not on the network elements will be deleted.

TRUE

FALSE

Page 13 of 15

121. Light propagates at different speeds in different media, and it seems that different media impede the propagation of light with different resistances .

True

False

122. In the process of adjusting the side of the data service, we often use the PING command to verify whether the Ethernet service at both ends of the device is established. If the port with the IP address 129.9.0.1 is continuously PING 200 times with a packet length of 1000 bytes, which is the command of DOS?

ping 129.9.0.1 -i 200 -t 1000

ping 129.9.0.1 -i 1000 -t 200

ping 129.9.0.1 -I 1000 -n 200

ping 129.9.0.1 -i 200 -n 1000

123. Which of the following is the main advantage of SDH? (Multiple choice)

Standard interface

Synchronous multiplexing

Powerful OAM

High compatibility

124. The rate represented by STM-1 is ().

125. OptiX OSN3500 supports a variety of cross-connect boards, and provides 40G/80G/120G/200G high-order cross-connect capacity and 5G/20G/40G/120G low -order cross-connect capacity according to different board models.

True

False

126. TM is a terminal multiplexer. Its function is: the line port inputs/outputs one STM-N signal, and the branch port can output/input multiple low-speed branch signals.

True

False

127. Both PDH and SDH have global unified standards .

True

False

128. Which of the following statements about extended ECC is incorrect?

Extended ECC is divided into automatic extended ECC and extended ECC in the specified mode

Auto-extending ECC means using a straight-through cable to connect the Ethernet ports of two NEs.

The extended ECC in the specified mode means that the server and client need to be specified.

Auto-extending ECC can be enabled on up to four network elements. In manual extended ECC mode, each server can connect up to three clients

129. Which of the following is the maximum number of OSN 2500 subracks that can be placed in a 2.2m cabinet?

130. The value of the MFAS byte increases with the sequence number of the OTUk/ODUk base frame, and includes the most () base frames

128

256

512

Page 14 of 15

131. Which of the following is the electrical layer overhead of OTN? (Multiple choice)

OPUk

ODUk

Och

OTUR

132. For Huawei equipment, the NODE ID is the unique identifier of the intelligent network element on the control plane. After the network is configured with intelligent services, it is recommended not to modify the NODE ID.

TRUE

FALSE

133. Four network elements form an STM-4 bidirectional multiplex section protection ring. Which of the following is the maximum service capacity on the network?

1008 2M

504 2M

252 2M

63 2M

134. Which of the following local maintenance terminals can be used to manage MSTP devices?

U2000 LCT

U2000 Web LCT

U2000 IP LCT

All of the above

135. 1510nm optical monitoring channel can be effectively amplified after passing through EDFA.

True

False

136. The frame structure of TU3 is a bit incomplete, and the gap needs to be filled. Which of the following phenomena can be effectively prevented by doing so?

Bit errors

Slip code

Scrambling

Dropped frames

137. The optical monitoring channel is set up for the monitoring of the WDM optical transmission system. ITU-T recommends that the wavelength of 1510nm is preferred, and the capacity is 2MHz/s .

True

False

138. Which of the following communication protocols are used for DCN management of Huawei equipment? (Multiple choice)

HWECC

TCP/IP

FTP

OSI

139. Which of the following is correct for optical amplifiers and regenerators? (Multiple choice)

Higher regenerator cost

When the regenerator works at a specific bit rate and a specific frame format

Where the amplifier can work at any bit rate and frame format

Optical amplifiers are rarely used, and regenerators are commonly used

140. Which of the following statements about basic LCAS functions are correct? (Multiple choice)

Automatic discovery of new network elements and links

Bandwidth increases or decreases dynamically.

Failed members are protected and recovered

Provide a fault-tolerant mechanism to enhance the robustness of the virtual cascading function

Page 15 of 15

141. Tunnel is a mechanism for transparently carrying information on the network. It is used to carry PW, and one PW can be carried on one Tunnel.

True

False

142. The SDH network will not change the structure and rate of the client-side signal.

TRUE

FALSE

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