QOS

Unanswered Question
Mar 30th, 2008

Which queing and compression techniques are needed to effectively use the available bandwidth for voice traffic? (Choose the best Two)

A. CBWFQ

B. LLQ

C. PQ or CQ

D. RTP header compression

E. TCP header compression

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Pavel Bykov Mon, 03/31/2008 - 00:37

B and D are actually the correct answers.

Wrong answers:

A: does not have a priority Queue

C: PQ is ok with policing (which is not mentioned) but CQ is not good for voice.

E: Voice uses extremely low bandwidth control data stream in TCP, that can tolerate loss and delay, so you needn't worry too much about TCP.

Joseph W. Doherty Mon, 03/31/2008 - 04:59

BTW: Choices A and B might cause some confusion since (LLQ) "The Low Latency Queueing feature brings strict priority queueing to Class-Based Weighted Fair Queueing (CBWFQ).".

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