JN0-280 Exam Training Practice Tests (Juniper Data Center, Associate (JNCIA-DC))]

Question 1

When considering bidirectional forwarding detection, which two statements are correct? (Choose two.)

A. The BFD default multiplier is 5. B. You can configure BFD per interface within the protocol stanza. C. The BFD default minimum interval is 3. D. The BFD operation always consists of minimum intervals and multipliers.

Correct Answer: B,D

Question 2

Exhibit:

R2 received an OSPF update from R1, and it received the same update from R3.
Referring to the exhibit, what will R2 do?

A. R2 does nothing with R3's update. B. R2 acknowledges R3 and discards it. C. R2 ignores the update from R3. D. R2 ignores the update from R1.

Correct Answer: C

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Question 3

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

A. Firewall filters B. RADIUS C. Port security D. Access Control Lists (ACLs)

Correct Answer: C

Question 4

When troubleshooting an OSPF neighborship, you notice that the router stopped at the ExStart state. What is the cause of this result?

A. The priority is set to 255. B. There is an interval timing mismatch. C. There is an area ID mismatch. D. There is an MTU mismatch.

Correct Answer: D

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Question 5

By default, which two statements are correct about BGP advertisements? (Choose two.)

A. BGP peers advertise routes from EBGP peers to other IBGP peers using its own address as thenext hop. B. BGP peers advertise routes received from IBGP peers to other IBGP peers. C. BGP peers advertise routes received from EBGP peers to other IBGP peers. D. BGP peers advertise routes from IBGP peers to EBGP peers using its own address as the next hop.

Correct Answer: C,D

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Question 6

In Ethernet switching, what is the primary function of a storm control policy?

A. To filter MAC addresses. B. To prevent loops in the network. C. To restrict the rate of certain types of traffic. D. To segregate broadcast domains.

Correct Answer: C

Question 7

EVPN/VXLAN is primarily used in modern data centers to:

A. Replace traditional routing protocols. B. Provide Layer 2 connectivity over a Layer 3 network. C. Enhance the physical security of the data center. D. Increase the physical distance between data centers.

Correct Answer: B

Question 8

Under which Junos hierarchy is a static route configured?

A. routing-options B. system C. routing-instances D. protocols

Correct Answer: A

Question 9

When considering bidirectional forwarding detection, which two statements are correct? (Choose two.)

A. The BFD default multiplier is 5. B. You can configure BFD per interface within the protocol stanza. C. The BFD default minimum interval is 3. D. The BFD operation always consists of minimum intervals and multipliers.

Correct Answer: B,D

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Question 10

What is the main advantage of using an Overlay Network in a data center?

A. It simplifies physical network design by allowing multiple virtual topologies over it. B. It replaces the need for physical network infrastructure. C. It offers higher physical bandwidth capacity. D. It provides direct Internet access to applications.

Correct Answer: A

Question 11

Referring to the exhibit, which two statements are correct about the IP fabric? (Choose two.)

A. This is a three-stage IP fabric. B. This is a five-stage fabric. C. Only traffic between pods must traverse the super spine devices. D. All traffic must traverse the super spine devices.

Correct Answer: B,C

Question 12

What is the primary purpose of OSPF in network routing?

A. To redistribute routes between autonomous systems. B. To offer dynamic routing within an autonomous system using link-state information. C. To encrypt data traffic between different networks. D. To provide path vector routing within an autonomous system.

Correct Answer: B

Question 13

Referring to the exhibit, what needs to be done to make this a valid IP fabric?

A. Add two connections between the spine nodes B. Add a connection between the spine nodes C. Remove the connection between the leaf nodes D. Remove one of the redundant links between a leaf node and a spine node

Correct Answer: C

Question 14

Which two protocols can you use for a data center underlay network? (Choose two)

A. VXLAN B. OSPF C. EVPN D. EBGP

Correct Answer: B,D

Question 15

Referring to the exhibit, which statement is true?

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

Correct Answer: C

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