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Cisco 642-437 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: VoIP Fundamentals | - Voice traffic signaling basics - Voice over IP architecture and components - Voice codecs and compression techniques |
| Topic 2: Signaling and Call Control | - SIP, H.323, and MGCP protocols - Gateways and gatekeepers - Dial plans and call routing |
| Topic 3: Troubleshooting and Operations | - Voice and QoS troubleshooting methodologies - Common VoIP deployment issues |
| Topic 4: Quality of Service (QoS) | - Congestion management and avoidance - Queuing techniques and bandwidth management - Traffic classification and marking - QoS models and mechanisms |
| Topic 5: Call Admission Control and Performance | - Voice network performance considerations - Call admission control mechanisms |
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
Which option is used within a dial plan to define the destination that a user is allowed to call?
- A. calling peers
- B. calling privileges
- C. destination patterns
- D. dial peers
Correct Answer: B 🗳️
When a Session Initiation Protocol user agent client initiates a call to another user agent server, what is the first message type that is sent to the Cisco SIP Proxy Server?
- A. setup
- B. trying
- C. invite
- D. initiate
Correct Answer: C 🗳️
Which QoS methodology combines strict priority queuing with class-based weighted fair queuing?
- A. RSVP
- B. LLQ
- C. IP Frame Relay RTP Priority
- D. IP RTP Priority
- E. Multilink PPP
Correct Answer: B 🗳️
Which voice quality issue is described as voice clipping or skips?
- A. packet loss
- B. serialization delay
- C. DSP delay
- D. fixed delay
- E. propagation delay
- F. jitter
Correct Answer: A 🗳️
A voice gateway has the isdn switch-type command in the global configuration and on the T1 signaling channel. Which configuration takes precedence if the two configurations are different?
- A. The voice gateway will use the isdn switch-type command that matches the ISDN switch that is connected to the T1 controller.
- B. The configuration in the global configuration always takes precedence over the interface configuration.
- C. The voice gateway parses the configuration from top to bottom and will use the first isdn switch-type entry.
- D. The configuration under the ISDN signaling channel takes precedence over the isdn switch-type command in the global configuration.
- E. The configuration in the T1 controller portion of the Cisco IOS configuration takes precedence over the isdn switch-type command in the global configuration.
Correct Answer: D 🗳️
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