642-436 practice test

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642-436 practice test

642-436 Exam Description

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Exam : Cisco 642-436
Title : Cisco Voice over IP (CVOICE)


1. Refer to the exhibit. Your customer wants to converge the existing PBX network with the IP network. The three remote offices have various types of PBXs. The customer is using a combination of tie-lines and trunks to connect the PBXs today.
Which kind of connection should be implemented to allow calls to be placed from 201-555-1000 to 727-555-1000 so that when the call is completed, network resources are returned for other uses?
A. PLAR
B. trunk
C. tie-line
D. answer-mode
Answer: C

2. Which option is true concerning the MGCP call agent?
A. acts only as a recorder of call details
B. provides only call signaling and call setup
C. manages all aspects of the call and voice stream
D. monitors the quality of each call after setup
Answer: B

3. Which dial plan characteristic shows the most obvious improvement by dropping a number translation step?
A. availability
B. post-dial delay
C. scalability
D. hierarchical design
Answer: B

4. At what point does the MGCP call agent release the setup of the call path to the residential gateways?
A. after the call agent has been notified that an event occurred at the source residential gateway
B. after the call agent has been notified of an event and has instructed the source residential gateway to create a connection
C. does not release call path setup
D. after the call agent has sent a connection request to both the source and destination and has relayed a modify-connection request to the source so that the source and destination can set up the call path
E. after the call agent has forwarded session description protocol information to the destination from the source and has sent a modify connection to the destination and a create-connection request to the source
Answer: D

5. Refer to the exhibit. You have been asked to configure a dial peer on R2 that will match only the extensions of the four telephones attached. Which dial-peer statement will you use?
A. dial-peer voice 1 pots
destination-pattern 5552.[0-5]0
B. dial-peer voice 1 pots
destination pattern 5552[5-6].0
C. dial-peer voice 1 pots
destination-pattern 555[2-5][56]
D. dial-peer voice 1 pots
destination-pattern 5552[5-6][05]0
Answer: D

6. Refer to the exhibit. When extension 201-555-1000 dials 404-555-1200, how are the digits manipulated in R1 so that they are presented correctly at R2?
A. The outbound VoIP dial peer is matched and all digits are sent.
B. The digits 404-555 are stripped off before matching the outbound POTS dial peer.
C. The digits 404-555 are stripped off by the connection trunk and R2 receives only 1200.
D. R1 collects the 1200 and prepends the tie-line digits 404555. That number is matched to a VoIP dial peer and sent to the appropriate address.
Answer: A