單項選擇題What best describes processing delay？（）

A.the time required from receipt of the incoming frame， until the frame/packet has been queued for transmission
B.the time taken for a single packet to traverse the physical medium from one end to the other
C.the time taken to place a frame on the physical medium for transport
D.the time spent for a packet to reside in the output queue of a router


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1.單項選擇題Which QoS model manages the QoS requirements for the network on a per-hop behavior （PHB） basis？（）

A.best-effort delivery
B.ingress committed rate （ICR）
C.shaping and policing
D.egress committed rate （ECR）
E.Integrated Services （IntServ）
F.differentiated services （DiffServ）

2.單項選擇題

Refer to the exhibit. The auto discovery qos command was configured on this interface 24 hours prior to the above configuration. Which statement is true about the configuration?（）

A. An IP address is needed on interface seriall/2.
B.The auto discovery qos command should be configured on the subinterface
C.A generated AutoOoS policy has been applied to serial1/2.
D.The collection of data has stopped.

3.單項選擇題Identify the link efficiency mechanism？（）

A.LFI
B.LLQ
C.RSVP
D.WFO
E.WRED

4.單項選擇題To provide quality of service （QoS） for voice traffic in an IEEE 802.1 q network， which class of service （CoS） value should be used in the 3-bit， user priority bits （PRI） field？ （）

A.The PRI field should contain the Cos value of 010
B.The PRI field should contain the Cos value of 011
C.The PRI field should contain the Cos value of 100
D.The PRI field should contain the Cos value of 101
E.The PRI field should contain the Cos value of 110
F.The PRI field should contain the CoS value of 111

5.多項選擇題What are two benefits of control plane policing？（）

A.protection against denial of service （DoS） attacks at infrastructure routers and switches
B. protection against known worm attacks in routers and switches
C.quality of service （QoS） control for packets that are sourced from the data plane of Cisco routers and switches
D.quality of service control （QoS） for packets that are destined to the control plane of Cisco routers and switches
E.quality of service （QoS） control for packets that are destined to the data plane of Cisco routers and switches