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Cisco 642-437 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Quality of Service (QoS) | - QoS models and mechanisms - Traffic classification and marking - Queuing techniques and bandwidth management - Congestion management and avoidance |
| Call Admission Control and Performance | - Voice network performance considerations - Call admission control mechanisms |
| VoIP Fundamentals | - Voice codecs and compression techniques - Voice traffic signaling basics - Voice over IP architecture and components |
| Troubleshooting and Operations | - Common VoIP deployment issues - Voice and QoS troubleshooting methodologies |
| Signaling and Call Control | - Dial plans and call routing - Gateways and gatekeepers - SIP, H.323, and MGCP protocols |
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
For multisite deployments with distributed call processing, which three dial plan solutions does Cisco recommend? (Choose three.)
- A. defining Call Admission Control for Cisco Extension Mobility
- B. using access and site codes
- C. defining remote site redundancy options
- D. implementing PSTN backup
- E. implementing PSTN access
- F. implementing Service Advertisement Framework
Correct Answer: B,D,E 🗳️
Refer to the exhibit.
An administrator is migrating a PBX telephony system to an IP Phone solution using a fixed numbering plan. The extension numbers and PSTN DIDs cannot be changed. Which of the following methods can be used in order to reach the individual extensions at Site B when called via the PSTN?
- A. No changes are necessary because PSTN calls are preceded with access code 9.
- B. The administrator needs to map the last four digits in the DID to the extension numbers using translation rules.
- C. The administrator can add a 1 to the DID for Site B to become 300-555-31xxx.
- D. The administrator needs to map the last four digits in the DID to the extension numbers and prefix a site code.
- E. The administrator needs to map the last four digits in the DID to the extension numbers and prefix an intersite code.
Correct Answer: B 🗳️
Explanation: Only visible for Test4Engine members. You can sign-up / login (it's free).
What is the reason that a call succeeds when COR is applied to the incoming dial peer and is equal to or greater than the COR settings that are applied to the outgoing dial peer?
- A. The incoming dial peer, by default, has the highest COR priority when no COR is applied.
- B. COR lists for incoming calls on the incoming dial peer are not a superset of COR lists for outgoing calls on the outgoing dial peer.
- C. The outgoing dial peer, by default, has the lowest priority.
- D. The COR list for incoming calls on the incoming dial peer is a superset of COR lists for outgoing calls on the outgoing dial peer.
Correct Answer: D 🗳️
Which of the following describes SIP Early Offer?
- A. In SIP Early Offer mode, the SDP media capabilities are sent in the INVITE message of the calling device.
- B. In SIP Early Offer mode, the SDP media capabilities are sent in the 200 OK messages of the calling device.
- C. In SIP Early Offer mode, the INVITE and the 200 OK messages use non-SDP message format to indicate SIP Early Offer
- D. SIP Early Offer always uses session indicator 183.
Correct Answer: A 🗳️
What should you use to configure endpoint addressing if you are using Cisco Unified Communications Manager Express with SRST?
- A. VoIP
- B. dial-peer
- C. ephone-dn
- D. POTS
Correct Answer: C 🗳️
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