多項選擇題

Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？（）

A. Packets can arrive out of order.
B. Packets must take the same path to the destination.
C. Once packets are received at the destination router， the router performs sampling to ensure the quality of the voice traffic.
D. Packets can experience varying delays across the network.
E. Packets containing voice samples are sequentially numbered by default， allowing for reordering upon arrival at the terminal router along the path.

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多項選擇題

For delay sensitive traffic， what are the three best ways that are used to prevent packet loss？（）

A. Compress payload.
B. Use header compression.
C. Increase link capacity.
D. Use random early detection.
E. Guarantee bandwidth to fragile flows.
F. Implement network-based application recognition.

多項選擇題

Which three functions are associated with a Cisco Unified CallManager？（）

A. connects traditional telephony devices to voice over IP infrastructure
B. converts analog signals to digital format
C. performs voice compression
D. performs call processing
E. performs dial plan administration
F. performs signaling and device control

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Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）

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For delay sensitive traffic， what are the three best ways that are used to prevent packet loss？ （）

Which three functions are associated with a Cisco Unified CallManager？ （）

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Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？（）

For delay sensitive traffic， what are the three best ways that are used to prevent packet loss？（）

Which three functions are associated with a Cisco Unified CallManager？（）