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Cisco 642-437 Exam Syllabus Topics:

Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:

1. 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) For non-IP packets, the CoS is set to 7 and DSCP-to-CoS mapping is not applied.
B) The DSCP-to-CoS map is applied.
C) The CoS setting is modified according to the CoS-to-DSCP map.
D) CoS is used to select the ingress and egress queues.

2. When a Cisco Unified Border Element is deployed to support RSVP-based CAC, which media flow method is required?

A) The Cisco Unified Border Element does not have to participate in the RSVP message exchange and will pass RSVP messages through unchanged using media flow-around.
B) RSVP-based CAC can be supported with either media flow-through or media flow-around if the Cisco Unified Communications Manager is configured as an RSVP agent.
C) RSVP-based CAC requires Cisco Unified Border Element to use media flow-through.
D) RSVP-based CAC only supports media flow-around.

3. In the destination patterns, which wildcard symbol indicates a single-digit placeholder?

A) %
B) +
C) . (period)
D) ()

4. Which WAN connection speeds are recommended for using link fragmentation and interleaving?

A) speeds between 512 and 768
B) speeds at 768 and lower
C) speeds at T1 and below
D) speeds between 64 and 512

5. Calculate how many IP phone calls can be sent across a 64 kbps Frame Relay link that uses the
G.729 codec being sampled 50 times a second, 20 bytes a sample, and has 6 bytes of Frame Relay header overhead with no checksum and uses header compression.

A) 7
B) 5
C) 3
D) 4

Solutions: