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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. Assuming no cRTP or header compression. How many VoIP G.729 calls can be made simultaneously over a 128-kb/s Frame Relay circuit (Layer 3) if 50 percent of the circuit is dedicated to voice and 50 percent is dedicated to data?

A) 4
B) 2
C) 3
D) 1
E) 5

2. Which voice quality issue is described as voice clipping or skips?

A) DSP delay
B) jitter
C) propagation delay
D) fixed delay
E) serialization delay
F) packet loss

3. Calls are failing to reach the E1 PRI circuit on the PSTN gateway. Which command would be useful in determining if the dial peers are configured properly?

A) ccapi inout
B) debug voice circuit
C) show controller e1 0/0/0
D) debug voice dial-peer
E) debug isdn q921

4. When a LAN switch port is configured with mls qos trust cos, if the pass-through dscp command option isn't present, how will the switch port treat incoming DSCP-marked frames?

A) The port will re-mark the frames according to the DSCP-to-CoS mapping table.
B) It will pass the DSCP-marked frames.
C) It will re-mark the DSCP frames according to the CoS-to-DSCP mapping table.
D) The switch port will convert the DSCP setting to CoS values and use that to select the egress queue for the frame.

5. Which two signaling methods are supported on Cisco FXO and FXS ports? (Choose two.)

A) kewlstart
B) AMI
C) ground-start
D) E&M
E) loop-start

Solutions: