多项选择题

What are three factors used to determine the amount of bandwidth that is required for a single VoIP call？（）

A. codec
B. link speed
C. Layer 2 encapsulation
D. packet overhead （IP/UDP/RTP）
E. link delay
F. total number of simultaneous calls that are allowed

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What are two ways to minimize the delay of VoIP packets that are traversing a network？（）

A. Use WFQ， CBWFQ， and LLQ to prioritize delay-sensitive packets.
B. Use WFQ， CBWFQ， and LLQ to compress the payload.
C. Give TCP packets priority over UDP packets.
D. Use control plane policing for cRTP queuing.
E. Use stacker and predictor to compress the payload.

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What are three Cisco Unified CallManager features？（）

A. programming interface to external applications
B. FXS and FXO port negotiation
C. AutoQos VoIP trust boundaries
D. signaling and device control
E. LLQ for voice and video traffic
F. directory and XML services

多项选择题

What are two components of the QoS Integrated Services （IntServ） model？（）

A. link efficiency
B. admission control
C. classification and marking
D. shaping and policing
E. congestion avoidance using the RTP protocol
F. resource reservation using the RSVP protocol

What are three factors used to determine the amount of bandwidth that is required for a single VoIP call？ （）

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What are three factors used to determine the amount of bandwidth that is required for a single VoIP call？（）