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JN0-349 Real Exam Questions

Enterprise Routing and Switching, Specialist (JNCIS-ENT)

110 questions available · Page 1 of 11

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Question 1 Single choice

You are concerned that someone from outside the company could use an open conference room port to access the network.

Which feature should you use to address this concern?

  1. A

    persistent MAC learning

  2. B

    802.1X

  3. C

    DHCP snooping

  4. D

    MAC limiting

Show answer and explanation

Correct answer: B

Question 2 Multiple choice

Which two statements about Layer 2 loop prevention protocols are correct? (Choose two.)

  1. A

    RSTP distributes the current tree topology using the root bridge.

  2. B

    STP can take 30 to 50 seconds to respond to a topology change.

  3. C

    RSTP can take 30 to 50 seconds to respond to a topology change.

  4. D

    STP distributes the current tree topology using the root bridge.

Show answer and explanation

Correct answers: A, B

Question 3 Single choice

Which statement is correct about access ports?

  1. A

    Access ports must have an IRB assigned to accept untagged traffic.

  2. B

    By default, access ports accept only VLAN tagged traffic.

  3. C

    Access ports must have an IRB assigned to accept VLAN tagged traffic.

  4. D

    By default, an access port can have only a single VLAN assigned.

Show answer and explanation

Correct answer: D

Question 4 Multiple choice

Which two statements are true about a unified in-service software upgrade (ISSU)? (Choose two.)

  1. A

    The graceful Routing Engine switchover (GRES) and nonstop active routing (NSR) features must be enabled.

  2. B

    It is possible to take PICs offline or bring them online during a unified ISSU.

  3. C

    Unified ISSU is only supported by the dual Routing Engine platforms.

  4. D

    The master Routing Engine and backup Routing Engine can be running different Junos versions before performing a unified ISSU.

Show answer and explanation

Correct answers: A, C

Question 5 Single choice

Click the Exhibit button.

Referring to the exhibit, which router will be selected as the DR?

  1. A

    R1

  2. B

    R5

  3. C

    R4

  4. D

    R3

Show answer and explanation

Correct answer: D

Question 6 Single choice

Which statement describes BFD?

  1. A

    BFD rapidly detects link failures.

  2. B

    BFD provides route loop protection.

  3. C

    BFD provides broadcast storm protection.

  4. D

    BFD provides high availability with multiple Routing Engines.

Show answer and explanation

Correct answer: A

Question 7 Multiple choice

What are three valid BGP message types? (Choose three.)

  1. A

    refresh

  2. B

    hello

  3. C

    database descriptor

  4. D

    keepalive

  5. E

    update

Show answer and explanation

Correct answers: A, D, E

Question 8 Single choice

What kind of filter would be written to protect control traffic destined for the switch?

  1. A

    A filter applied to the default VLAN

  2. B

    A filter applied to the native VLAN

  3. C

    A filter applied to the management interface

  4. D

    A filter applied to the loopback interface

Show answer and explanation

Correct answer: D

Question 9 Single choice

What BGP attribute is mostly likely to influence a remote AS that you do not peer with?

  1. A

    This is not possible given the local scope of BGP

  2. B

    AS path

  3. C

    MED

  4. D

    Local preference

Show answer and explanation

Correct answer: B

Question 10 Multiple choice

Which three link-specific fields must match between OSPF neighbors before they form an adjacency over a broadcast medium? (Choose three.)

  1. A

    router priority

  2. B

    hello interval

  3. C

    neighbor

  4. D

    dead interval

  5. E

    options

Show answer and explanation

Correct answers: B, C, D