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Juniper JN0-648 Exam Practice Questions (P. 2)

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Question #6
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-load-balance command to the configuration. After committing, you notice that the flows are still using only one path.
In this scenario, which statement is correct?
  1. A
    The clear pim join-distribution command must be issued.
  2. B
    The interfaces must be specified to use for load balancing.
  3. C
    IGMP snooping must also be configured.
  4. D
    PIM join load-balancing only works for PIM-DM.

Correct Answer:
A

Question #7
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?
  1. A
    The packet will be placed in a queue associated with the BA classifier.
  2. B
    The packet will be placed into the queue which is least congested.
  3. C
    The packet will be placed into the queue that has the most bandwidth assigned to it.
  4. D
    The packet will be placed in a queue associated with the MF classifier.

Correct Answer:
A

Question #8
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?
  1. A
    Apply the DSCP code-point to the [edit class-of-service host-outbound-traffic] hierarchy.
  2. B
    Apply the DSCP code-point to the [edit class-of-service interface lo0.0] hierarchy
  3. C
    Apply the DSCP code-point in an egress policer.
  4. D
    Apply the DSCP code-point to a rewrite rule.

Correct Answer:
A

Question #9
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?
  1. A
    There is an interface type mismatch.
  2. B
    There is an interface subnet mask mismatch.
  3. C
    There is an OSPF area mismatch.
  4. D
    There is an interface MTU mismatch.

Correct Answer:
A

Question #10
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?
  1. A
    You must ensure that the VLANs are balanced between two different root bridges.
  2. B
    You must enable RSTP to account for all VLANs.
  3. C
    You must ensure that the bridge priority is set to the lowest value on all switches in the Layer 2 domain.
  4. D
    You must enable all VLANs, 2 through 300, under the VSTP configuration.

Correct Answer:
D

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