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Cisco 642-437 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| VoIP Fundamentals | - Voice over IP basics
|
| Cisco Unified Border Element (CUBE) | - CUBE features and configuration
|
| Cisco Unified Communications Manager Express | - CUCME configuration
|
| Quality of Service (QoS) | - QoS mechanisms
|
| Troubleshooting | - Troubleshooting voice and QoS issues
|
| Voice Gateways and Call Routing | - Gateway implementation and configuration
|
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
An access layer switch is configured to extend priority to an IP phone. Cisco Discovery Protocol is enabled on all ports. What are the three possible ways that an IP phone can be instructed to treat the Layer 2 CoS priority value of the attached PC? (Choose three.)
- A. configured CoS level
- B. untrusted
- C. configured DSCP level
- D. trusted
- E. configured IEEE 802.1Q
- F. trusted IEEE 802.1Q
Refer to the exhibit.
Your company's QoS policy states that all traffic that is arriving at access layer switches from IP phones should be marked with a DSCP value of 46 and that all untagged traffic that is arriving from a PC that is attached to an IP phone should be marked with a CoS value of 1. Which two options will satisfy the requirements for the CoS-to-DSCP map and are the correct QoS commands? (Choose two.)
- A. mls qos map cos-dscp 0 10 18 26 34 46 48 56
- B. mls qos 1
- C. mls qos dscp 1
- D. mls qos map cos 0 8 18 26 40 48 50 56
- E. mls qos cos 1
- F. mls qos map dscp 0 8 16 26 32 40 48 56
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Two networks have Resource Reservation Protocol and Cisco Unified Border Element gateway configuration. To RSVP reserve bandwidth and guarantee a minimum bit rate between these two networks, which command should you use on the outgoing gateway dial peer of the Cisco Unified Border Element?
- A. h323-gateway voip rsvp-reserve
- B. acc-qos guaranteed-delay
- C. req-qos guaranteed-delay
- D. ip rsvp bandwidth bandwidth
Refer to the exhibit.
Cisco 642-437 Exam
An administrator is migrating a PBX telephony system to a VoIP 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. The administrator can replace the last three digits of the DID with xxx and use translation rules to map the individual extensions.
- B. The administrator can replace the last three digits of the DID with xxx to cover the individual extensions.
- C. The administrator needs to map the last four digits in the DID to the extension numbers using translation rules.
- D. The administrator needs to implement an auto-attendant solution where individual extensions can be dialed.
What is the function of class-based marking?
- A. Marking frames only sets information in the Layer 2 headers of a frame so that the frame can be identified and distinguished from other packets or frames.
- B. Marking frames or packets sets information in the Layer 2 and Layer 3 headers of a packet so that the frame or packet can be identified and distinguished from other frames or packets in the same traffic flow.
- C. Marking allows network devices to classify a packet or frame, based on a specific traffic descriptor.
- D. Marking packets is based only on CoS value, IP precedence value or DSCP value allows Layer 3 frames to be identified and distinguished from other packets.
- E. Marking frames based only on CoS value or IP precedence value allows Layer 2 frames to be identified and distinguished from other frames.
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