JN0-649: Enterprise Routing and Switching, Professional (JNCIP-ENT)Demo

By Juniper · Question Mode

QuestionQ4

Class of service (CoS)

Click the Exhibition button.

You are asked to troubleshoot voice-quality issues on your newly implemented VoIP network. You notice that voice packets are being dropped. You have verified that the packets are correctly marked for the expedited-forwarding queue.

Referring to the exhibit, what must you configure to solve the problem?

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  • A You must configure a multifield classifier to put the VoIP traffic in the correct queue.
  • B You must configure a rewrite rule to ensure that the traffic is scheduled properly in the device.
  • C You must configure a scheduler to allocate bandwidth to the expedited forwarding queue.
  • D You must configure a policer to ensure that the queue is not being starved.
Explanation

Junos default scheduling reserves output-link bandwidth and buffer space only for best-effort and network-control traffic; the expedited-forwarding queue has no reserved resources by default. A scheduler, mapped to the expedited-forwarding forwarding class and applied to the interface, allocates the required bandwidth and queue resources for VoIP traffic.

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