Juniper JNCIP-ENT JN0-648 Questions & Answers

• Question 81:

  You are currently using VLAN IDs 2 through 300 within your Layer 2 domain and you need to configure VSTP to prevent loops. You must ensure that all VLANs are loop free.

  In this scenario, which statement is correct?

  A. You must ensure that the VLANs are balanced between two different root bridges.

  B. You must enable RSTP to account for all VLANs.

  C. You must ensure that the bridge priority is set to the lowest value on all switches in the Layer 2 domain.

  D. You must enable all VLANs, 2 through 300, under the VSTP configuration.

  Correct Answer: D

• Question 82:

  You must ensure that all management traffic sourced from your Junos devices is set with a specific DSCP code-point value.

  Which action will accomplish this task?

  A. Apply the DSCP code-point to the [edit class-of-service host-outbound-traffic]hierarchy.

  B. Apply the DSCP code-point to the [edit class-of-service interface lo0.0]hierarchy

  C. Apply the DSCP code-point in an egress policer.

  D. Apply the DSCP code-point to a rewrite rule.

  Correct Answer: A

• Question 83:

  Click the Exhibit button.

  

  A router is attempting to form an OSPF neighborship with another router. However, the OSPF neighborship fails to establish completely.

  Referring to the exhibit, what is the problem?

  A. There is an interface type mismatch.

  B. There is an interface subnet mask mismatch.

  C. There is an OSPF area mismatch.

  D. There is an interface MTU mismatch.

  Correct Answer: A

• Question 84:

  You have configured CoS on a Junos device. A packet is classified as best effort by a behavior aggregate (BA) classifier, and as expedited forwarding by a multifield (MF) classifier.

  Which statement is true in this scenario?

  A. The packet will be placed in a queue associated with the BA classifier.

  B. The packet will be placed into the queue which is least congested.

  C. The packet will be placed into the queue that has the most bandwidth assigned to it.

  D. The packet will be placed in a queue associated with the MF classifier.

  Correct Answer: A

• Question 85:

  What are three well-known mandatory BGP attributes? (Choose three.)

  A. MED

  B. AS-path

  C. origin

  D. next-hop

  E. community

  Correct Answer: BCD

• Question 86:

  You have PIM SM multicast configured and running in a network environment comprised of EX4300 devices. Your customers report increased delay when switching channels using IPTV. To help decrease the delay, you implement PIM join load balancing. You add the set protocols pim join-loadbalance command to the configuration. After committing, you notice that the flows are still using only one path.

  In this scenario, which statement is correct?

  A. The clear pim join-distributioncommand must be issued.

  B. The interfaces must be specified to use for load balancing.

  C. IGMP snooping must also be configured.

  D. PIM join load-balancing only works for PIM-DM.

  Correct Answer: A

• Question 87:

  What is the correct authentication processing order on EX Series switches when multiple Layer 2 authentication methods are enabled?

  A. MAC RADIUS –andgt; 802.1X –andgt; captive portal

  B. 802.1X –andgt; MAC RADIUS –andgt; captive portal

  C. 802.1X –andgt; captive portal –andgt; MAC RADIUS

  D. captive portal –andgt; MAC RADIUS –andgt; 802.1X

  Correct Answer: B

• Question 88:

  You are implementing a single spanning tree instance in your network and want to use the protocol that will give you the best convergence time in the event of a physical network failure of the root bridge.

  Which spanning tree protocol will satisfy this requirement?

  A. RSTP

  B. STP

  C. MSTP

  D. VSTP

  Correct Answer: A

• Question 89:

  Which BGP message type contains NLRI information?

  A. notification

  B. keepalive

  C. update

  D. open

  Correct Answer: C

• Question 90:

  Click the Exhibit button.

  

  Referring to the exhibit, which two statements are true regarding Q-in-Q tunneling? (Choose two.)

  A. The C-VLAN traffic will be encapsulated with an outer VLAN tag of 150.

  B. The C-VLANs 100-200 will be sent as the inner VLAN tag.

  C. The C-VLAN 150 will be sent as the inner VLAN tag.

  D. The C-VLAN traffic will be encapsulated with an outer VLAN tag of 10.

  Correct Answer: BD