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Question ID 13060

Assume a 30-millisecond voice payload, 6 bytes for the Layer 2 header, 1 byte for the end-
of-frame flag, and the IP, UDP, and RTP headers are compressed to 2 bytes, how much
bandwidth should be allocated to the strict priority queue for eight VoIP calls that use a
G.729 codec over a multilink PPP link with cRTP enabled?

Option A

121.6 kb/s

Option B

92.8 kb/s

Option C

88.4 kb/s

Option D

83.2 kb/s

Option E

78.4 kb/s

Correct Answer D
Explanation Reference: http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a0080094ae2. shtml


Question ID 13061

To which QoS tool category does compressed RTP belong?

Option A

classification

Option B

marking

Option C

link efficiency

Option D

queuing

Option E

prioritization

Correct Answer C
Explanation Explanation: LLQ is a feature that provides a strict PQ to CBWFQ. LLQ enables a single strict PQ within CBWFQ at the class level. With LLQ, delay-sensitive data (in the PQ) is dequeued and sent first. In a VoIP with LLQ implementation, voice traffic is placed in the strict PQ.

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