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Cisco 642-437 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Quality of Service (QoS) | - Queuing techniques and bandwidth management - Traffic classification and marking - Congestion management and avoidance - QoS models and mechanisms |
| Topic 2: Call Admission Control and Performance | - Voice network performance considerations - Call admission control mechanisms |
| Topic 3: VoIP Fundamentals | - Voice traffic signaling basics - Voice codecs and compression techniques - Voice over IP architecture and components |
| Topic 4: Signaling and Call Control | - SIP, H.323, and MGCP protocols - Dial plans and call routing - Gateways and gatekeepers |
| Topic 5: Troubleshooting and Operations | - Voice and QoS troubleshooting methodologies - Common VoIP deployment issues |
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
1. In which situation would the trust boundary be located at the access layer?
A) if there are endpoints that cannot be trusted and connect directly to the distribution layer
B) if the access layer switch cannot trust or re-mark incoming traffic from endpoints properly
C) if the endpoints, both IP phones and PCs, are incapable of marking traffic properly
D) if PCs are switched through an IP phone and the IP phone traffic can be trusted to mark both traffic streams properly
2. 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 h225 events
B) debug h245 events
C) debug ccsip all
D) debug voip ipipgw
E) debug voice ccapi inout
3. Which three factors must be considered when calculating the total bandwidth of a VoIP call, in order to avoid voice quality issues? (Choose three.)
A) codec size
B) data-link overhead
C) sample size
D) CRC usage
E) capacity of network links
4. Using Cisco best practices, on which application should you implement calling privileges?
A) type of service
B) class of restriction
C) route pattern
D) quality of service
5. Which of the following describes SIP Early Offer?
A) In SIP Early Offer mode, the SDP media capabilities are sent in the 200 OK messages of the calling device.
B) In SIP Early Offer mode, the INVITE and the 200 OK messages use non-SDP message format to indicate SIP Early Offer
C) In SIP Early Offer mode, the SDP media capabilities are sent in the INVITE message of the calling device.
D) SIP Early Offer always uses session indicator 183.
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: D | Question # 3 Answer: A,B,C | Question # 4 Answer: B | Question # 5 Answer: C |
