單項(xiàng)選擇題What is a drawback to using the IntServ model?()

A.RSVP that signals QoS requests per individual flow
B.not scalable to large implementations
C.admission control not supported
D.use of dynamic port numbers 
E.UDP not supported


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1.單項(xiàng)選擇題What is the best description of serialization delay? ()

A.the time it takes for a Layer 3 switch or a router to switch a packet from an inbound interface to the queue of the outbound interface
B.the time it takes for a propagate from source to destination
C.the time it takes to place a frame on the physical medium for transport
D.the time a packet resides in the outbound queue of a router

2.多項(xiàng)選擇題Which two statements about the best effort model for QoS are true?()

A.delay sensitive packets are given preferential treatment
B.the default policy identifies a delay sensitive class and default class
C.the default policy identifies a delay sensitive class, best effort class, and default class
D.the model is highly scalable
E.the model is still predominant on the internet F the model provides guaranteed service

3.多項(xiàng)選擇題Which two statements are true about CAC?()

A.CAC is implemented in the call setup phase to allocate bandwidth resources
B.CAC is implemented in the call maintenance phase to allocate bandwidth resources
C.CAC is utilized during the call teardown phase to ensure that all resources have been released
D.CAC uses the Cisco RSVP (Resource Reservation Protocol) Agent to integrate call-processing capabilities with the underlying network infrastructure
E.CAC is implemented in the call setup phase to determine the destination of the call

4.多項(xiàng)選擇題For defining the QoS policies for each traffic class, which parameters should be identified?()

A.minimum bandwidth guarantee
B.average bandwidth guarantee
C.optimum bandwidth guarantee
D.maximum bandwidth rate
E.IP precedence
F.priority

5.單項(xiàng)選擇題Which statements is true about Foreign Exchange Station (FXS) ports on a router?()

A.the FXS interface allows an analog connection to be directed at the public switched telephone network (PSTN’s) central office
B.the FXS interface connect directly to a standard telephone, fax machine, or sililar device and supplies ring, voltage, and dial tone
C.the FXS interface connect directly to an IP phone and supplies ring, voltage, and dial tone
D.the FXS interface connect directly to ISDN voice channels

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