642-437 Exam Training Practice Tests (Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0))]

Question 1

Which statement about the DiffServ model is true?

A. DiffServ is based on building a virtual circuit in the Internet using the bandwidth reservation technique. B. DiffServ provides traffic management using QoS classifications. C. DiffServ is a way to provide the assurance of sufficiently low delay and packet loss for certain types of applications or traffic. D. DiffServ specifies a mechanism for classifying and managing network traffic and providing QoS on modern IP networks.

Correct Answer: D

Question 2

A new Cisco 7965 IP phone is installed on a Cisco Unified Communications Manager Express system. When the phone requests the .loads file from the TFTP server, it sees that the versions are different. What does the IP phone do to resolve this issue?

A. The IP phone does not boot up and will require manual intervention to factory reset the phone before a new firmware image can be downloaded. B. The IP phone boot requests the XMLDefault.cnf.xml file and boots up. C. The IP phone attempts to obtain the new firmware file image from the TFTP server. D. The IP phone requests the SEP<mac>.cfg file and reboots.

Correct Answer: C

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Question 3

Which command can be used to display the outgoing dial peer that is reached when the telephone number 919195551234 is dialed?

A. show dial-peer number 919195551234 B. show dialplan number 919195551234 C. show number 919195551234 D. show dialplan 919195551234

Correct Answer: B

Question 4

Which process does a voice gateway use to determine how to route an outbound call?

A. The voice gateway uses the called number to match the destination pattern of outbound dial peers using the first-match rule. B. The voice gateway uses the calling number to match the destination pattern of the outbound dial peers using the longest-match rule. C. The voice gateway uses the first-match rule to match the calling number to the destination pattern of the outbound POTS and VoIP dial peers. D. The voice gateway uses the longest-match rule to match the called number to the destination pattern to the outbound POTS or VoIP dial peers.

Correct Answer: D

Question 5

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

A. The auto qos voip command is applied globally in the switch. B. The auto qos voip command is applied to each interface. C. The auto qos voip trust command is applied to each interface. D. The auto qos voip cisco-phone command is applied to each interface.

Correct Answer: C,D

Question 6

Which is a function of RTP?

A. replay protection B. encryption C. call multiplexing D. payload identification

Correct Answer: D

Question 7

Which media resource requires hardware digital signal processors?

A. transcoding B. music on hold C. annunciator D. conference bridge

Correct Answer: A

Question 8

Which three factors must be considered when calculating the total bandwidth of a VoIP call, in order to avoid voice quality issues? (Choose three.)

A. codec size B. data-link overhead C. CRC usage D. capacity of network links E. sample size

Correct Answer: A,B,E

Question 9

Which command will correctly map Class of Service mappings 0 through 7 to Differentiated Services Code Point 0, 10, 18, 26, 34, 46, 48, and 56, accordingly?

A. mls qos map cos-dscp 0 10 18 26 34 46 48 56 B. mls qos map 0 10 18 26 34 46 48 56 C. mls qos cos-dscp map 0 10 18 26 34 46 48 56 D. mls quos cos map 0 10 18 26 34 46 48 56

Correct Answer: A

Question 10

DRAG DROP
All calls over the IP WAN use G.729. IP phones A and B use Cisco Unified Communications Manager Express.
IP Phone A is on a call with IP Phone B.
IP Phone A conferences in Analog Phone C with IP Phone B.
Software conference resources are not being used.
Drag the appropriate DSP resource for each gateway from the list to the correct locations in the graphic so the call can be completed.

Correct Answer:

Explanation:
Order is: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_0_1/ccmsys/a05dsp.html

Question 11

Which command should you use to associate a Session Initiation Protocol phone using a tag of 1 with a directory number with a tag of 20?

A. number 1 dn 20 B. button 1:20 C. button 20:1 D. number 20 dn 1

Correct Answer: A

Question 12

How many rules does a voice translation profile allow?

A. up to 15 B. up to 8 C. up to 25 D. up to 12

Correct Answer: A

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