JNCDS-WAN Practice Questions - Juniper Networks Certified Design Specialist, WAN (JNCDS-WAN) Exam

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A WAN designer needs to provide strict bandwidth guarantees for voice traffic (G.711 and G.729 codecs) across an MPLS WAN. Which Class of Service (CoS) mechanism provides these guarantees?

Strict Priority (Expedited Forwarding) queuing for voice traffic ensures voice packets are always forwarded before lower-priority traffic, minimizing latency and jitter Weighted Random Early Detection (WRED) applied to the voice queue Tail drop on all queues with a small buffer for voice packets OSPF route metric manipulation to route voice through lower-capacity links

Correct Answer:

Strict Priority (Expedited Forwarding) queuing for voice traffic ensures voice packets are always forwarded before lower-priority traffic, minimizing latency and jitter

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