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Cisco Voice over IP

Exam Number: 642-436
Associated Certifications: CCVP
Duration: 75 minutes (60 - 70 questions)
Available Languages: English
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Exam Description Exam Topics Recommended Training Additional Resources
Exam Description
The 642-436 CVOICE Cisco Voice over IP is the exam associated with the CCVP certification. This exam tests a candidate’s knowledge of the foundational elements of VOIP calls, and the description of dial plans, and the implementation of gateways, gatekeepers and IP-IP gateways. Candidates can prepare for this exam by taking the CVOICE Cisco Voice over IP course.

Exam Topics
The following topics are general guidelines for the content likely to be included on the Remote Access exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes, the guidelines below may change at any time without notice.

Describe the components of a gateway
Describe the function of gateways
Describe DSP functionality
Describe the different types of voice ports and their usage
Describe dial peer types
Describe codecs and codec complexity

Describe a dial plan
Describe a numbering plan
Describe digit manipulation
Describe path selection
Describe calling privileges
Describe call coverage

Describe the basic operation and components involved in a VoIP call
Describe VoIP call flow
Describe RTP, RTCP, cRTP, and sRTP
Describe H.323
Describe MGCP
Describe SCCP
Describe SIP
Identify the appropriate gateway signaling protocol for a given situation
Describe voice quality considerations
Choose the appropriate codec for a given situation

Implement a gateway
Describe the gateway call routing process
Configure analog voice ports
Configure digital voice ports
Describe considerations for PBX integration
Configure dial-peers
Configure hunt groups and trunk groups
Configure digit manipulation
Configure calling privileges
Verify dial-plan implementation
Implement fax and modem support on a gateway
Configure a gateway to provide DTMF support

Describe the function and interoperation of gatekeepers within an IP Communications network
Describe the function and types of gatekeepers
Describe the interoperation of devices with a gatekeeper
Describe gatekeeper signaling
Describe Dynamic Zone Prefix Registration with a gatekeeper
Describe gatekeeper redundancy

Implement a gatekeeper
Configure devices to register with a gatekeeper
Configure gatekeeper to provide dial-plan resolution
Configure gatekeeper to provide call admission control
Verify gatekeeper operation

Implement an IP-to-IP gateway
Describe the IP-to-IP gateway features and functionality
Configure gatekeeper to support an IP-to-IP gateway
Configure IP-to-IP gateway to provide address hiding
Configure IP-to-IP gateway to provide protocol and media interworking
Configure IP-to-IP gateway to provide call admission control
Verify IP-to-IP gateway implementations

QUESTION 1
When setting up a VoIP call, what is the first thing a gateway router tries to match to a dialed number?

A. session target
B. call leg
C. destination pattern
D. IP route

Answer: C

QUESTION 2
In North America, which E&M signaling type is used most often for geographically separated equipment?

A. Type III B. Type II C. Type V D. Type I E. Type IV

Answer: B

QUESTION 3
When using CUBE, which two statements describe how media flow-through differs from media flow-around? (Choose two.)

A. Media flow-through terminates the signaling channel and the RTP streams flow directly between endpoints.
B. Media flow-through terminates the RTP streams but allows signaling to flow directly between endpoints.
C. Media flow-around and media flow-through function in a similar manner, but media flow-around supports NAT traversal.
D. Media flow-around provides address hiding by terminating both signaling and RTP
streams.
E. Media flow-through provides address hiding by terminating both signaling and RTP
streams.
F. Media flow-around terminates the signaling stream and allows RTP streams to flow directly between endpoints.

Answer: E,F

QUESTION 4
Which two are types of Call Admission Control? (Choose two.)

A. gateway zone bandwidth
B. topology-based
C. resource-based
D. gatekeeper-controlled RSVP E. local
F. QoS-based

Answer: C,E

QUESTION 5
Site A uses three-digit internal numbers and remote Site B uses four-digit internal numbers. All calls to the PSTN are routed through Site B. What dial plan below best represents provision simplicity, assuming the NANP numbering plan?

A. Translate all called numbers within Site A to four digits. B. Translate all called numbers within Site B to three digits.
C. Translate all called numbers at either site to ten digits.
D. Translate all called numbers leaving Site A to ten digits. Answer: D
QUESTION 6
Which three are supervisory signals? (Choose three.)

A. call waiting
B. on hook
C. ring
D. busy
E. off hook

Answer: B,C,E

QUESTION 7
Which command parameter specifies that the router should not attempt to initiate a trunk connection but should wait for an incoming call before establishing the trunk?

A. connection trunk answer-mode 408555
B. connection trunk 408555….
C. connection-trunk 404555…. answer-mode
D. ds0-group timeslots 1-23 type ext-sig
E. voice-port 1/0:1

Answer: C

QUESTION 8
What does a gatekeeper do when it matches a technology prefix?

A. strips off the zone prefix and forwards the technology prefix to the remote gatekeeper
B. strips off the technology prefix and sends the matching zone prefix to the remote gatekeeper
C. sends both the technology prefix and zone prefix to the remote gatekeeper
D. strips off both the technology prefix and zone prefix and forwards the remaining destination number

Answer: C

QUESTION 9
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 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
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 been notified that an event occurred at the source residential gateway
E. 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

Answer: E

QUESTION 10
What is the best description of an MGCP endpoint?

A. the gatekeepers in a VoIP network
B. IP phones
C. any analog telephony device (PBX, switch, etc.)
D. the interconnection between packet and traditional telephone networks

Answer: D

QUESTION 11
Using Cisco Unified Communications Manager Express, what four steps are necessary to implement COR? (Choose four.)

A. Define COR labels.
B. Configure COR lists on voice ports.
C. Configure dial peers and assign COR lists. D. Assign COR list to ephone-DN.

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Recommended Training about 642-436 exam PDF
The following courses are the recommended training for 642-436 exam PDF.
642-436 Q & A with Explanations
642-436 Audio Exam
642-436 Study Guide
642-436 Preparation Lab

Exam Number/Code: 642-436
Exam Name: Cisco Voice over IP (CVOICE)

“Cisco Voice over IP (CVOICE)”, also known as 642-436 exam, is a Cisco certification.
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