Juniper Juniper Certifications JN0-343 Questions & Answers

• Question 81:

  Which statement describes the role of an OSPF ABR?

  A. It is used to inject external routes into OSPF.

  B. It is used to export internal routes from OSPF.

  C. It is used to connect a nonbackbone area to Area 0.

  D. It is used to connect multiple nonbackbone areas.

  Correct Answer: C

• Question 82:

  -- Exhibit ?

  

  -- Exhibit -You recently configured a new EBGP peering from R1 to your ISP. You are asked to determine which BGP routes are being advertised from R1 to this new EBGP neighbor.

  Referring to the exhibit, which command is used to verify this information on R1?

  A. show route export

  B. show route receive-protocol bgp 172.27.0.2

  C. show route protocol bgp

  D. show route advertising-protocol bgp 172.27.0.1

  Correct Answer: D

• Question 83:

  What are two characteristics of a switched LAN? (Choose two.)

  A. All devices are part of the same collision domain.

  B. Each device participates in its own collision domain.

  C. All traffic is flooded out to all devices.

  D. Traffic is intelligently forwarded to learned destinations.

  Correct Answer: BD

• Question 84:

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

  A. dead interval

  B. options

  C. neighbor

  D. router priority

  E. hello interval

  Correct Answer: ABE

• Question 85:

  Which statement describes the flooding bridging mechanism when it receives traffic destined to an unknown MAC address?

  A. The switch will discard the traffic and send a destination unreachable message.

  B. The switch will clear the bridging table and forward traffic out all ports.

  C. The switch will silently discard the traffic.

  D. The switch will forward the traffic out all ports.

  Correct Answer: D

• Question 86:

  You are asked to ensure that an unauthorized switch running spanning tree cannot be added to any edge port on your EX Series switch. The ports must discard any incoming spanning tree packets but the interface must continue to forward traffic.

  What should you do to accomplish the behavior?

  A. Enable BPDU protection.

  B. Enable BPDU protection and use the drop feature.

  C. Enable root protection and use the drop feature.

  D. Enable root protection.

  Correct Answer: B

• Question 87:

  Which statement is true about STP on an EX Series switch?

  A. STP requires MSTP to also be configured.

  B. STP automatically rebuilds the tree when the topology changes.

  C. STP builds loop-free paths in nonredundant Layer 2 networks.

  D. The root bridge is the switch with the highest bridge ID.

  Correct Answer: B

• Question 88:

  Which two statements are true about RTG? (Choose two.)

  A. RTG can be used as a replacement for STP.

  B. Both active and backup links forward traffic.

  C. RTG is based on the 802.1Q standard.

  D. You only need to configure RTG on one side of the link.

  Correct Answer: AD

• Question 89:

  Your OSPF network consists of five Junos devices, R1 through R5, all in Area 0. You want to reset the LSDB for the entire area.

  Which action accomplishes this task?

  A. Add the overload parameter to each device's OSPF configuration.

  B. Issue the clear ospf database purge command on R1.

  C. Issue the clear ospf neighbor command on R2.

  D. Configure the OSPF lsa-refresh-interval parameter to 0 on each device.

  Correct Answer: B

• Question 90:

  -- Exhibit ?

  

  -- Exhibit -

  Based on the exhibit and assuming default port costs, in which RSTP port role and state is Switch C's interface connecting to Switch B?

  A. root, forwarding

  B. alternate, discarding

  C. alternate, forwarding

  D. designated, forwarding

  Correct Answer: B