JN0-280 by Juniper Actual Free Exam Q&As

Question 1

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

A. Mismatched VLAN configurations B. Identical IP addresses on all LAG interfaces C. Overutilization of CPU resources D. Excessive broadcast traffic

Discussion 0

Correct Answer: A Vote an answer

Question 2

Which Junos OS routing table stores IPv6 addresses?

A. inet0.6 B. inet.0 C. inet.6 D. inet6.0

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Correct Answer: D Vote an answer

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Question 3

What roles do the Designated Router (DR) and Backup Designated Router (BDR) play in OSPF?

A. They determine the shortest path first algorithm. B. They reduce the number of adjacencies on broadcast networks. C. They are responsible for generating LSAs for external routes. D. They redistribute routes between OSPF and non-OSPF networks.

Discussion 0

Correct Answer: B Vote an answer

Question 4

Which of the following are functions of MACsec? (Choose two)

A. It prevents MAC flooding attacks. B. It provides Layer 2 encryption. C. It offers data integrity and confidentiality. D. It enables VLAN tagging.

Discussion 0

Correct Answer: B,C Vote an answer

Question 5

What is the definition of a trunk interface on a switch?

A. An interface that carries excess traffic. B. An interface that carries high bandwidth. C. An interface that carries multiple VLANs. D. An interface that connects directly to powerful servers.

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Correct Answer: C Vote an answer

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Question 6

What is the purpose of using route reflectors in BGP?

A. To increase the speed of BGP convergence B. To reduce the number of required IBGP sessions in a network C. To automatically select the best route D. To encrypt BGP messages

Discussion 0

Correct Answer: B Vote an answer

Question 7

What does filter-based forwarding in networking typically allow?

A. Forwarding decisions based on MAC addresses B. Load balancing across multiple CPUs C. Routing decisions based on extended criteria like packet headers D. Aggregation of multiple routes into a single entry

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Correct Answer: C Vote an answer

Question 8

Layer 2 interfaces operate in which two modes? (Choose two.)

A. Tagged B. Modular C. Access D. Trunk

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Correct Answer: C,D Vote an answer

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Question 9

Referring to the exhibit, which statement is true?

A. BFD only records a syslog message if three BFD packets are missed. B. BFD packets are being sent every second. C. BFD will bring down the BGP session if no BFD packets are received for 2700 seconds. D. BFD will bring down the BGP session if no BFD packets are received for 2700 milliseconds.

Discussion 0

Correct Answer: D Vote an answer

Question 10

In the context of data center networking, what is the primary purpose of an Underlay Network?

A. To provide a physical infrastructure for an Overlay Network. B. To facilitate virtual machine migrations. C. To handle external network connections exclusively. D. To encrypt data traffic between servers.

Discussion 0

Correct Answer: A Vote an answer

Question 11

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

A. It can be configured to shut down a port during a storm. B. It encrypts broadcast and multicast traffic. C. It automatically reroutes traffic during a storm. D. It supports thresholds for broadcast, multicast, and unknown unicast traffic.

Discussion 0

Correct Answer: A,D Vote an answer

Question 12

Which two statements are true with regards to MACsec?

A. It provides encryption for an Ethernet traffic between two network nodes. B. It provides authentication for an Ethernet traffic between two network nodes. C. It does not provide encryption for an Ethernet traffic between two network nodes. D. It does not provide authentication for an Ethernet traffic between two network nodes.

Discussion 0

Correct Answer: A,B Vote an answer

Question 13

Which three technologies improve high availability and convergence in a data center network? (Choose three.)

A. Failover Group (FG) B. link aggregation group (LAG) C. graceful restart (GR) D. link loss adjacency E. Bidirectional Forwarding Detection (BFD)

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Correct Answer: B,C,E Vote an answer

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Question 14

Filter-based forwarding is typically used to:

A. Implement policy-based routing decisions. B. Increase the security of the routing process. C. Automatically generate routing entries. D. Optimize the routing table size.

Discussion 0

Correct Answer: A Vote an answer

Juniper Data Center, Associate (JNCIA-DC) - JN0-280 Exam Practice Test