Exam 642-887 Question id=3185 QOS in a Service Provider IP NGN Environment

Which three conditions can occur when metering traffic using a dual token bucket traffic policing QoS mechanism on Cisco routers?

A. conform
B. pass
C. violate
D. exceed
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How a Traffic Policing Mechanism Regulates Traffic
The time interval between token updates(Tc) to the token bucket is updated at the CIR value each time a packet arrives at the traffic policer. The Tc token bucket can contain up to the Bc value. If a packet of size B is greater than the Tc token bucket, then the packet exceeds the CIR value and a configured action is performed. If a packet of size B is less than the Tc token bucket, then the packet conforms and a different configured action is performed.


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