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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. How does Packet Loss Concealment improve voice quality?

A) Packet Loss Concealment will compensate for packet loss rates between 1 and 5 percent by generating a reasonable replacement packet to improve the voice quality.
B) Cisco Packet Loss Concealment technology decreases the voice sampling rate to 10 ms of the voice payload to smooth gaps in the voice stream.
C) Packet Loss Concealment intelligently analyzes missing packets and generates a reasonable replacement packet to improve the voice quality.
D) Packet Loss Concealment will buffer 20 to 50 ms of a voice stream to minimize lost or out-oforder voice packets.

2. Which three methods are used by a Cisco Unified Border Element to provide network hiding? (Choose three.)

A) Back-to-back user agent, replacing all SIP-embedded IP addressing
B) media flow-through
C) IP network privacy
D) IP network security boundary
E) Intelligent IP address translation for RTP flows
F) RSVP

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

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

4. DRAG DROP
Drag the appropriate IOS commands from the left and drop them in the spaces on the right in order to configure the dial peers for the Cisco Unified Border Element. The IP WAN connection between the two Cisco Unified Border Elements uses SIP. Not all commands and spaces are used.

Cisco 642-437 Exam

5. Which codec supports VAD and CNG?

A) G.711
B) G.723.1
C) G.729B
D) G.726

Solutions: