642-437 試験問題を無料オンラインアクセス

How many VoIP G.711 calls can be made simultaneously over a 256-kb/s Frame Relay circuit (Layer 3) if cRTP is enabled and the default IOS voice payload size of 160 is used?

• A.4
• B.1
• C.3
• D.5

Which voice feature operates the same as a firewall on a data network?

• A.call coverage
• B.calling privileges
• C.call routing and path selection
• D.digit manipulation

Which Cisco Unified Communications Manager component provides direct digital-to-digital conversion from one codec to another?

• A.media converter
• B.digital signal processor
• C.media termination point
• D.coder

Which Cisco Unified Communications Manager component acts as a voice switch between multiple telephony circuits and can provide signaling and media conversion?

• A.gateway
• B.gatekeeper
• C.PBX
• D.media exchanger

DRAG DROP
Drag the components from the left and drop them under the appropriate categories on the right.

Cisco 642-437 Exam

正解：

Explanation:
DSP delay, Packetization delay, Serialization delay & Dejitter Buffer delay are Fixed delay types. Queuing and Buffering delay & Network delay are Variable Delay types.
http://www.cisco.com/en/US/tech/tk652/tk698/technologies_white_paper09186a00800a8993.shtml
Fixed Delay DSP Delay Serialization Delay Dejitter Buffer Delay Processing Delay
Variable Delay Network Delay Queuing Delay