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Cisco 642-437 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Troubleshooting and Operations | - Voice and QoS troubleshooting methodologies - Common VoIP deployment issues |
| Quality of Service (QoS) | - Traffic classification and marking - QoS models and mechanisms - Queuing techniques and bandwidth management - Congestion management and avoidance |
| Signaling and Call Control | - Dial plans and call routing - Gateways and gatekeepers - SIP, H.323, and MGCP protocols |
| Call Admission Control and Performance | - Call admission control mechanisms - Voice network performance considerations |
| VoIP Fundamentals | - Voice over IP architecture and components - Voice codecs and compression techniques - Voice traffic signaling basics |
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
Which troubleshooting command will allow you to view the Cisco Unified Border Element operations for components such as the description of the media flow, negotiated parameters, and RTP port numbers?
- A. debug voip ipipgw
- B. debug ccsip all
- C. debug h245 events
- D. debug h225 events
- E. debug voice ccapi inout
Correct Answer: A 🗳️
What are two advantages of deploying dual VLANs on an access layer switch that connects to an IP phone? (Choose two.)
- A. It is typically used for IP phones that are not Cisco IP phones, IP softphones, or when Cisco IP phones or other Cisco voice devices (such as the Cisco VG248 Analog Phone Gateway) do not support PCs to be connected to them.
- B. Implementing dual VLANs allows you to connect two devices that are in different VLANs to a single switch port.
- C. There are no advantages if a Cisco IP phone has a PC attached. Both the voice and data services should be in the same VLAN.
- D. Dual VLANs allow for the logical separation of data and voice traffic, which allows the network to process these two traffic types individually.
- E. This is the default state when an IP phone is connected to an unconfigured Cisco Catalyst switch.
Correct Answer: B,D 🗳️
What is the function of TEHO in a path selection strategy?
- A. Allows users to place an intersite call by dialing a site code.
- B. Defines each site with a unique site code.
- C. Uses the WAN link for call routing to avoid PSTN charges; in addition, the PSTN breakout should be as close as possible to the final PSTN destination.
- D. Uses the WAN link for call routing to avoid PSTN charges.
Correct Answer: C 🗳️
Which four commands are used to configure VoIP dial peers? (Choose four.)
- A. port number
- B. prefix
- C. session target
- D. codec
- E. description
- F. destination-pattern
- G. forward-digits
- H. dial-peer voice
Correct Answer: C,D,F,H 🗳️
Which digit manipulation command should be used to globally expand local 4-digit extension numbers beginning with a 4 to a full telephone number starting with 1919555 when calling outbound?
- A. num-exp 4... 1919555
- B. prefix 19195554
- C. prefix 1919555
- D. num-exp 4... 19195554
Correct Answer: D 🗳️
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