642-437 Sample Question: 15

Question: 15

Which QoS methodology combines strict priority queuing with class-based weighted fair queuing?

A. IP RTP Priority
B. Multilink PPP
C. IP Frame Relay RTP Priority
D. RSVP
E. LLQ

Answer: E

642-437 Sample Question: 14

Question: 14

In which situation would the trust boundary be located at the access layer?

A. if the endpoints, both IP phones and PCs, are incapable of marking traffic properly
B. if PCs are switched through an IP phone and the IP phone traffic can be trusted to mark both traffic streams properly
C. if the access layer switch cannot trust or re-mark incoming traffic from endpoints properly
D. if there are endpoints that cannot be trusted and connect directly to the distribution layer

Answer: A

642-437 Sample Question: 13

Question: 13

Which QoS methodology combines strict priority queuing with class-based weighted fair queuing?

A. IP RTP Priority
B. Multilink PPP
C. IP Frame Relay RTP Priority
D. RSVP
E. LLQ

Answer: E

642-437 Sample Question: 12

Question: 12

Which media resource requires hardware digital signal processors?

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

Answer : D

642-437 Sample Question: 11

Question: 11

What is the class selector PHB used for in the differentiated services model?

A. Best-effort service
B. Low-delay service
C. Bandwidth guarantee
D. Backward compatibility

Answer : D

642-437 Sample Question: 10

Question: 10

What are the four types of per-hop behavior used with DSCP? (Choose four)

A. Expedited forwarding
B. Default
C. Class-bit
D. Assured forwarding
E. Class-selector
F. Express forwarding

Answer: A,B,D,E

642-437 Sample Question: 9

Question: 9

Which statement best describes dial peers in a voice gateway. (Choose two.)

A. Dial peers are call legs that are used to identify call source and destination endpoints and to define the characteristics that are applied to each call leg in the call connection.
B. Dial peers are configured with call legs that are essential to implementing dial plans and providing voice services over an IP packet network.
C. A dial peer is a physical addressable endpoint in a voice gateway.
D. Dial peers create physical connections called call legs to complete an end-to-end call.

Answer: A,C

642-437 Sample Question

Question No: 13

You are configuring a network to support voice to the PSTN. One important aspect to the configuration is to be able to determine the individual slot, subunit, and port number from the gateway endpoint identifier. Which signaling protocol is appropriate for this situation?

A. H.323
B. SIP
C. SCCP
D. MGCP

Answer: D

Download 642-437 Exam Questions

642-437 Sample Question

Question No: 12

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. Reboot the router.
B. Remove the ephone, then re-add the ephone.
C. Verify that the url authentication is configured for the correct authentication URL.
D. Verify that the url services is configured to the correct URL for services.
E. Enter the command no telephony-service, then enter telephony service in global configuration mode.
F. Enter the command no create cnf-files, then enter create cnf-files under the telephony-service configuration.

Answer: F

642-437 Sample Question

Question No: 11

Calls are failing to egress the local PSTN gateway that uses an E1 PRI circuit. Which debug command would be most useful in determining which dialed digits are
being sent to the PSTN?

A. debug voice dial-peer
B. debug isdn q921
C. debug isdn q931
D. ccapi inout

Answer: C

Section: (none)
Explanation

Explanation/Reference:
Explanation:
"Pass Any Exam. Any Time." - www.actualtests.com 18
Cisco 642-437 Exam
Debug isdn q931 command to display information about call setup and teardown of ISDN network connections (Layer 3).In order to verify the layer 3 signaling we
need to enable layer 3 signaling command. ISDN q921 is for layer2. Debug isdn q931 shows the calling number and called number. If the calls are failing, we can
also see the ISDN cause codes from the debug isdn q931 command.
http://www.cisco.com/en/US/docs/ios/11_2/debug/command/reference/dipx.html#wp13263