Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) (642-437) Free Practice Test

Question 1

Which two protocols are peer-to-peer protocols? (Choose two.)

A. MGCP

B. SIP

C. H.323

D. SCCP

Correct Answer: B,C

Question 2

Refer to the exhibit.

Cisco 642-437 Exam
Which class is always present even though it is not in the configuration snip?

A. class class-default

B. class best-effort

C. default class

D. best-effort class

E. class class-scavenger

Correct Answer: A

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Question 3

The administrator has added a new ephone-dn and a new ephone to the Cisco Unified Communications Manager Express system, but the new phone will not register with the system. If other phones are operating properly, which of the following should the administrator do first to try to resolve the issue?

A. Remove the ephone, then re-add the ephone.

B. Reboot the router.

C. Verify that the url authentication is configured for the correct authentication URL.

D. Enter the command no create cnf-files, then enter create cnf-files under the telephony-service configuration.

E. Enter the command no telephony-service, then enter telephony service in global configuration mode.

F. Verify that the url services is configured to the correct URL for services.

Correct Answer: D

Question 4

Which queuing mechanism guarantees low-latency propagation and high-bandwidth priority?

A. Priority queuing

B. Custom queuing

C. Class-based weighted fair queuing

D. Low latency queuing

Correct Answer: D

Question 5

Which three methods are used by a Cisco Unified Border Element to provide network hiding? (Choose three.)

A. Intelligent IP address translation for RTP flows

B. Back-to-back user agent, replacing all SIP-embedded IP addressing

C. media flow-through

D. IP network security boundary

E. RSVP

F. IP network privacy

Correct Answer: A,D,F

Question 6

Which two statements describe ways that AutoQoS VoIP configuration is applied on a Cisco catalyst switch? (Choose two.)

A. The auto qos voip trust command is applied to each interface.

B. The auto qos voip cisco-phone command is applied to each interface.

C. The auto qos voip command is applied to each interface.

D. The auto qos voip command is applied globally in the switch.

Correct Answer: A,B

Question 7

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. There will be no impact the audio stream because the audio packets are arriving in the jitter buffer window.

B. The jitter buffer will replay the previous voice packets to replace those packets that exceed 30 milliseconds to avoid speech gaps.

C. 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.

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.

Correct Answer: A

Question 8

Which four Cisco IOS commands are required to configure a DHCP server on a voice gateway to support a voice subnet so that both IP addresses and the IP address of the TFTP server are provided? The voice subnet has an address of 10.1.130.0/24, the default gateway is 10.1.130.1/24, and the TFTP server is located at 10.1.5.2. (Choose four.)

A. option 150 ip 10.1.5.2

B. default-router 10.1.130.1

C. ip dhcp pool voice

D. subnet 10.1.130.1/24

E. default-gw 10.1.130.1

F. network 10.1.130.0 255.255.255.0

G. option 150 10.1.5.2

H. dhcp pool voice

Correct Answer: A,B,C,F

Question 9

Which three commands should you use to configure DHCP information on Cisco Unified Communications Manager Express? (Choose three.)

A. ip dhcp pool

B. dns server

C. default gateway

D. network

E. ip address

F. default-router

G. subnet mask

Correct Answer: A,D,F

Question 10

Refer to the exhibit.

Callers dial 0 to reach an outside line. When they try to place calls to directory services (322) or services (422), they hear the reorder tone. What needs to be edited in the dial peer to allow these calls to complete successfully?

A. The destination pattern needs to be edited so that the first digit that is matched is a 1 and the forward-digits all command needs to be added to the dial peer.

B. The destination pattern needs to be edited so that the first digit that is matched is a 0 and the forward-digits 3 command needs to be added to the dial peer.

C. The forward-digits all command needs to be applied to the dial peer.

D. The destination pattern needs to be edited so that the first digit that is matched is a 0 and the forward-digits all command needs to be added to the dial peer.

E. A "prefix 1" statement needs to be added to the dial-peer configuration.

F. The destination pattern is incorrect. It needs to start with a 9.

G. The destination pattern needs to be edited so that the first digit that is matched is a 0.

Correct Answer: B

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Question 11

Which queuing method is the basis for the low latency queuing?

A. custom queuing

B. weighted random early detection

C. class-based weighted fair queuing

D. weighted fair queuing

Correct Answer: C

Question 12

Which two digit manipulation commands should you use in a POTS dial peer? (Choose two.)

A. forward-digits

B. num-exp

C. voice translation-profile

D. translation-profile

E. [no] digit-strip

Correct Answer: A,E

Question 13

What is the prerequisite for configuring Cisco AutoQoS VoIP on a Cisco catalyst switch?

A. Cisco Discovery Protocol version 2.

B. Configure the mls qos global configuration command.

C. Configure trust boundaries.

D. Configure correct bandwidth on all interfaces.

E. Configure Cisco Express Forwarding.

Correct Answer: A

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Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) (642-437) Free Practice Test