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单选题
The policy action of color is used for congestion control under which circumstance?（）
A
congestion in an upstream router
B
congestion in a downstream router
C
contention for queue space on an egress interface
D
contention for queue space on an ingress interface
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考题
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考题
The policy action of color is used for congestion control under which circumstance?（）A、congestion in an upstream routerB、congestion in a downstream routerC、contention for queue space on an egress interfaceD、contention for queue space on an ingress interface
考题
单选题A routing policy has three terms and the first term of the policy does not contain a terminating action. What will become of the routes after they have been evaluated by the first term?（）A
In the absence of a terminating action, all routes are accepted.B
The route will be evaluated by the second term in the policy.C
The default action will be applied.D
In the absence of a termination action, all routes are rejected.
考题
单选题You are experiencing contention in the queue on an egress interface of the router. Which policy action should be used for congestion control?（）A
markB
colorC
filterD
discard
考题
单选题You are working with a client to deploy QoS on their Frame Relay WAN. They would like to be able to allow packets to cross the Frame Relay WAN but have them marked as discard eligible if they exceed the QoS policy. How would you accomplish this task?（）A
Configure a class map that sets the DE bit so that the policy map can correctly apply a violate-action if the policy is exceeded.B
Configure a service policy that sets the DE bit and apply it to the serial interface connected to the Frame Relay WAN.C
Configure a policy map that has a burst-max action of setting the DE bit if the policy is exceeded.D
Configure a policy map that has a violate-action to change the DE bit from 0 to 1.
考题
单选题Which of the following definitions can be used to define the term ‘offset ’ as a characteristic of controller action?（）A
The period of time in which the set point and the control point coincideB
The periodic change between the set point and the control pointC
The variable difference between the set point and the control pointD
The constant difference between the set point and the control point
考题
单选题In （） the control action is independent on(of) the output.A
a closed loop control systemB
an open loop control systemC
a boiler control systemD
a steering gear control system
考题
单选题In （）the control action is independent on the output.A
a closed loop control systemB
an open loop control systemC
a boiler control systemD
a steering gear
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