Instant Download Cisco : 642-437 Questions & Answers as PDF & Test Engine
Updated: Sep 12, 2026
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Cisco 642-437 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Describe a Dial Plan | 13% | - Dial plan components and functions - Digit manipulation and route patterns - Call routing and PSTN connectivity |
| Topic 2: Implement QoS for Voice Networks | 15% | - QoS principles and requirements - Call Admission Control - Queuing mechanisms and AutoQoS - Classification, marking, and policing |
| Topic 3: Implement Cisco Unified Communications Manager Express | 18% | - IP phone registration and provisioning - Basic call features and dial plans - CUCME setup and configuration |
| Topic 4: Describe VoIP Call Legs and Signaling | 20% | - Codec selection and media transport - VoIP architecture and call flow - H.323, SIP, and MGCP protocols |
| Topic 5: Implement Voice Gateways | 22% | - Analog and digital voice ports - Dial peers configuration - Gateway types and deployment models - Fax and modem support |
| Topic 6: Implement Gatekeeper and Cisco Unified Border Element | 12% | - Interoperability and security - Gatekeeper functions and configuration - CUBE deployment and features |
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
Which two protocols are peer-to-peer protocols? (Choose two.)
- A. SIP
- B. H.323
- C. MGCP
- D. SCCP
Correct Answer: A,B π³οΈ
Which type of voice port supports Dialed Number Identification Service signaling for outbound calls, and inbound calls carry only ANI?
- A. FXS
- B. E&M
- C. FXO
- D. FXS-DID
Correct Answer: C π³οΈ
Which component in the Media Gateway Control Protocol environment is responsible for controlling the operation of the gateways?
- A. gate master
- B. call agent
- C. gatekeeper
- D. calling authority
Correct Answer: B π³οΈ
Refer to the exhibit.
When an inbound PSTN call from 4087071222 arrives at the ISDN port that is shown in the exhibit, which dial peer will be matched for the inbound leg?
- A. Dial-peer 123, because incoming called-number takes precedence over answer-address.
- B. The matching inbound dial peer will be selected at random.
- C. Although dial-peer 123 takes precedence, there is no direct-inward-dial that is configured, therefore 2123 will be selected.
- D. Although dial-peer 123 takes precedence, there is no port that is configured under dial-peer 123, therefore dial-peer 2123 will be selected.
- E. Dial-peer 2123, because answer-address takes precedence over incoming called-number.
Correct Answer: A π³οΈ
Refer to the exhibit.
How does a switch port that receives marked traffic from a Cisco IP phone use the mls qos trust cos command?
- A. The CoS setting is modified according to the CoS-to-DSCP map.
- B. The DSCP-to-CoS map is applied.
- C. CoS is used to select the ingress and egress queues.
- D. For non-IP packets, the CoS is set to 7 and DSCP-to-CoS mapping is not applied.
Correct Answer: A π³οΈ
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