JN0-280 Dumps Questions – Effective Way to Get Certified

If you're in the field of Juniper, you know how important it is to stay up-to-date with the latest knowledge and skills to protect your organization's networks and data. One way to do that is by obtaining JNCIA-DC, specifically the JN0-280 exam. While preparing for the JN0-280 exam, you might consider using JN0-280 dumps to help you familiarize yourself with the exam format and content. These JN0-280 exam dumps questions can be an effective way to gauge your knowledge and identify areas where you may need additional study. Study online free JN0-280 exam dumps below.

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1. Which LSA types are associated with OSPF? (Choose three)

Router LSA (Type 1)

Network LSA (Type 2)

Summary LSA (Type 3)

External LSA (Type 5)

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2. In the context of Layer 2 switching, what does RSTP stand for?

Rapid Spanning Tree Protocol

Routing Switch Transport Protocol

Redundant Switching Tree Protocol

Resilient Switching Transport Protocol

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3. What is the default Junos behavior of access ports?

Allow only untagged traffic

Allow only tagged traffic

Allow both tagged and untagged traffic

Allow a maximum of 80 percent untagged traffic

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4. Which of the following BGP attributes is considered first in the route selection process?

Local Preference

AS Path Length

Origin

MED

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5. What is the primary purpose of OSPF in network routing?

To redistribute routes between autonomous systems.

To provide path vector routing within an autonomous system.

To offer dynamic routing within an autonomous system using link-state information.

To encrypt data traffic between different networks.

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6. What are two characteristics of a typical EBGP underlay fabric? (Choose two.)

Each device in an EBGP fabric will be configured in its own unique private A

Each device in an EBGP fabric will be configured to be part of the same private A

An EBGP fabric relies on an IGP to advertise loopback IPs.

An EBGP fabric does not require an IGP to advertise loopback IPs.

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7. How can OSPF be configured to prefer one route over another?

By setting a higher cost on the preferred route.

By configuring route redistribution.

By adjusting interface bandwidth.

By setting a lower cost on the preferred route.

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8. Which OSPF troubleshooting tool is used to check the OSPF process and neighborship?

Traceoptions

Ping

Route summarization

SNMP

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9. During a BGP Graceful Restart, what happens to the routes learned from the restarting neighbor?

They are immediately removed from the routing table.

They are marked as stale but kept in the routing table.

They are advertised to other BGP neighbors.

Their metric is increased to prevent their use.

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10. What are the different OSPF area types? (Choose two)

Stub Area

Not-So-Stubby Area (NSSA)

Default-Free Zone

Virtual Link Area

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11. What is a common issue to check for when troubleshooting a LAG not forming correctly?

Mismatched VLAN configurations

Excessive broadcast traffic

Identical IP addresses on all LAG interfaces

Overutilization of CPU resources

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12. When configuring OSPF, what is the purpose of defining areas?

To specify different encryption methods.

To control route advertisement and manage traffic.

To assign different IP address ranges.

To provide network redundancy.

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13. Which of the following are correct about OSPF router ID selection? (Choose two)

It can be manually configured.

It is chosen based on the highest IP address of any active interface by default.

It is always the IP address of the loopback interface.

It is selected based on the lowest MAC address.

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14. What is the function of the 'Weight' attribute in BGP, and where is it used in the route selection process?

It is used to prioritize routes received from different EBGP peers and is considered before the AS_PATH attribute.

It determines the stability of a route and is checked after the Local Preference attribute.

It is a Cisco-specific attribute used to prefer paths from one BGP speaker over another, evaluated before the Local Preference.

It is used to balance load among multiple links and is considered after the MED attribute.

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15. In OSPF, what is the function of the Link-State Database (LSDB)?

To store OSPF routing tables.

To maintain a list of OSPF neighbors.

To keep the topology structure of the network.

To log changes in network topology.

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16. How does a layer 2 switch populate its bridge table?

It stores the protocol number of frames traversing the network.

It stores both the source and destination MAC addresses of frames traversing the network.

It stores the destination MAC address of frames traversing the network.

It stores the source MAC address of frames traversing the network.

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17. Which of the following is a key benefit of implementing High Availability (HA) in a network?

Reduced network security

Increased network downtime

Enhanced data redundancy

Slower data recovery

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18. When configuring MAC address filtering on a Junos switch, which feature is primarily used?

Firewall filters

RADIUS

Access Control Lists (ACLs)

Port security

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19. Which statement is correct about a five-stage IP fabric topology?

There is a maximum of five hops between any end-devices

They are commonly referred to as interconnected data centers

There is a maximum of three hops between any end-devices

They are typically deployed in small to medium data centers

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20. Martian addresses are:

Special routes for interplanetary communication.

Addresses used in MPL

Unroutable addresses that are generally filtered by routers.

Addresses used for load balancing.

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21. Which of the following are features of storm control on Junos switches? (Choose two)

It can be configured to shut down a port during a storm.

It supports thresholds for broadcast, multicast, and unknown unicast traffic.

It encrypts broadcast and multicast traffic.

It automatically reroutes traffic during a storm.

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22. Which two statements are correct about BGP? (Choose two.)

IBGP peers do not advertise routes learned from IBGP peers to other IBGP peers.

EBGP uses the AS path to avoid loops.

IBGP sessions are typically established between physical router interfaces.

EBGP sessions are typically established between router loopback interfaces.

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23. Which two statements are correct about aggregated Ethernet bundles? (Choose two.)

You must enable the chassis to support aggregated Ethernet interfaces.

You must purchase a services license for the chassis to support aggregate Ethernet interfaces.

You must specify which interfaces are members of a specific aggregated Ethernet bundle.

You must enable LACP when configuring aggregated Ethernet bundles.

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24. Which of the following statements are true regarding Graceful Restart (GR)? (Choose two)

It helps in maintaining uninterrupted forwarding during a routing process restart.

It is used to increase the convergence time of the network.

It requires support from both the restarting router and its neighbors.

It decreases network stability during protocol restarts.

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25. What is the primary purpose of MAC address filtering on a switch?

To control the flow of encrypted data.

To limit the rate of incoming packets.

To prevent unauthorized devices from accessing the network.

To distribute traffic evenly across multiple links.

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26. Why is EVPN often used in conjunction with VXLAN in modern data centers?

To enable direct Internet access for applications.

For providing Layer 2 connectivity over a Layer 3 fabric.

To increase the physical bandwidth of the underlying network.

To physically separate different customer environments.

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27. Which VLAN tagging method inserts a 4-byte tag into the Ethernet frame?

ISL

Dot1Q

Q-in-Q

MPLS

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28. What are two common reasons for BGP routes to be in the hidden state? (Choose two.)

Routes are being rejected by a policy

Routes are being filtered from the inet.2 routing table

The next hop is unresolvable

The BGP neighbor is in a different autonomous system

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29. In a Virtual Chassis configuration, which of the following is true?

It allows physical stacking of switches that are geographically dispersed.

It reduces the operational complexity of managing multiple switches.

It decreases network redundancy and reliability.

Only two switches can be connected in a Virtual Chassis setup.

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30. Referring to the exhibit, which two statements are true? (Choose two.)

The configuration will not pass the commit check.

The BGP group is configured to attempt an EBGP peering session with 192.168.100.2.

The configuration will pass the commit check.

The BGP group is configured to attempt an EBGP peering session with 192.168.100.1.

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31. You are configuring OSPF in your network as shown in the exhibit. R1 has been configured with interface metrics. All other links in the network are using the default interface metric.

In this scenario, which OSPF interface on R1 will be preferred when routing traffic between R1 and R5?

ge-0/0/0

ge-0/0/3

ge-0/0/1

ge-0/0/2

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32. Referring to the exhibit, how many collision domains are present in the topology?

3

0

2

1

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33. What is an aggregate route?

a static route with only one contributing route

a group of IP addresses to which a router will not forward traffic

a mechanism that allows multiple routes to be summarized into a single route

often called the route of last resort

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34. Referring to the exhibit, how many milliseconds will pass before the BGP neighbor is considered dead?

1000ms

9000ms

2000ms

3000ms

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35. What happens if a frame with a known destination MAC address enters a switch?

The egress PFE performs a MAC address lookup and determines the ingress PFE and port.

The ingress PFE sends the header information to the R

The ingress PFE performs a MAC address lookup and determines the egress PFE and port.

The MAC address is added to the bridge table.

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36. What is the default route preference for a static route on a Junos device?

130

15

10

5

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