Cisco 400-051 Exam Preparation Guide


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Question No. 1

Assume 20 bytes of 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 six VoIP calls that use a G.729 codec over a multi PPP link with cRTP enabled? (Choose two.)

Answer: C

Question No. 2

Refer to the exhibit.

The snippet is part of a PRT log from a Jabber for Windows user who is unable to login via Mobile and Remote Access (MRA).

Which is the root cause of this issue?

Answer: A

Question No. 3

A collaboration engineer is configuring toll-fraud prevention in the dial plan. Which two sets of patterns allow Cisco Unity Connection to transfer calls to local and long distance numbers while blocking all other patterns?

(Choose two.)

Answer: E, F

Question No. 4

Refer to the exhibit.

Which event is next in the SIP call flow when Andrew hangs up the call?

Answer: B

Question No. 5

Which two actions does the Cisco Unified IP phone use the initial Trust list to perform? (Choose two)

Answer: D, E

Question No. 6

Refer to the exhibit.

Assume that the serial interface link bandwidth is full T1. What is the maximum amount of bandwidth allowed for priority queuing of RTP packets with a DSCP value of EF?

Answer: E

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