多项选择题

Which three components are part of the Intelligent Network Services provided by the Cisco AVVID framework? （）

A. IP telephony
B. security
C. IP multicasting
D. QoS

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单项选择题

Jitter is an unwanted variation of one or more characteristics of a periodic signal in electronics and telecommunications and（）refers to call issues that cause variations in timing or time of arrival.

A.echo
B.jitter
C.packet loss
D.digitized sampling

单项选择题

Which VPN management feature would be considered to ensure that the network had the least disruption of service when making topology changes?（）

A. dynamic reconfiguration
B. path MTU discovery
C. auto setup
D. remote management

多项选择题

Which two of these are correct regarding the recommended practice for distribution layer design based on the following configuration?（）

A. use a Layer 2 link between distribution switches
B. use a Layer 3 link between distribution switches
C. use a redundant link to the core
D. use a Layer 3 link between distribution switches with route summarization