Cisco CCNP 642-437

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Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:

1. Voice packets are arriving at a destination with a variance of between 20 and 50 milliseconds. If the jitter buffer has a capacity of 30 milliseconds, what is the impact on the audio at the receivers IP phone? Voice packets are arriving at a destination with a variance of between 20 and 50 milliseconds. If the jitter buffer has a capacity of 30 milliseconds, what is the impact on the audio at the receivers IP phone?

A) The jitter buffer will replay the previous voice packets to replace those packets that exceed 30 milliseconds to avoid speech gaps.
B) The DSP will automatically increase the jitter buffer size after sampling the range of incoming voice packets to accommodate the wider range in variation of voice packet arrival times to avoid voice gaps.
C) There will be no impact the audio stream because the audio packets are arriving in the jitter buffer window.
D) The IP phone will negotiate in mid-call a lower bandwidth codec to reduce the delay in the arrival of voice packets to avoid voice gaps.

2. When troubleshooting poor VoIP call quality, which two tools should you use to measure the overall metrics? (Choose two.)

A) mean opinion score
B) quality of experience
C) signal-to-noise ratio
D) quality of service
E) R-Factor

3. When you configure Cisco Unified Border Element to support RSVP-based CAC, when are the RSVP path and reservation messages sent and received?

A) immediately after the call setup message is received and the reservation message is received, after H.245 capabilities negotiation is completed
B) after the H.245 capabilities negotiation is completed
C) immediately after the call setup message is received
D) after the global command call rsvp-sync is configured

4. Refer to the exhibit.

Cisco 642-437 Exam
When an international call to 90114989531212001 is placed from extension 2001, which of the following statements is true?

A) The call will fail because the incoming COR list is not a superset of the outgoing COR list
B) The call will succeed because the incoming COR list has the highest priority, by default, when no incoming COR list is applied.
C) The call will fail because no incoming COR list is applied.
D) The call will succeed because the incoming COR list is a superset of the outgoing COR list.

5. When you configure a VoIP dial peer, which command should be used to configure the remote gateway with the destination IPv4 address 172.16.1.118?

A) remote target ipv4:172.16.1.118
B) destination ipv4:172.16.1.118
C) session target ipv4:172.16.1.118
D) destination address 172.16.1.118

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