Matching Traffic Conditions for Single Rate, Dual Token Bucket Traffic Policing
Question
Which three traffic conditions can be matched when configuring single rate, dual token bucket traffic policing on Cisco routers? (Choose three.)
Answers
Explanations
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Single rate, dual token bucket (SRDTB) traffic policing is a QoS mechanism used on Cisco routers to control traffic and prevent congestion on a network. This mechanism uses two token buckets, one for conforming traffic and the other for non-conforming traffic. The buckets are used to differentiate between traffic that conforms to the configured traffic rate and traffic that violates it.
The three traffic conditions that can be matched when configuring SRDTB traffic policing on Cisco routers are:
Conform: This condition is used to match traffic that conforms to the configured traffic rate. In SRDTB policing, conforming traffic is allowed to pass through without any delay or drop, while the tokens in the conforming token bucket are used to replenish the non-conforming token bucket.
Exceed: This condition is used to match traffic that exceeds the configured traffic rate but does not violate the maximum rate. In SRDTB policing, excess traffic is allowed to pass through with a delay or drop, depending on the configuration. The tokens in the excess token bucket are used to replenish the non-conforming token bucket.
Violate: This condition is used to match traffic that violates the configured maximum rate. In SRDTB policing, violating traffic is dropped or remarked, depending on the configuration. The tokens in the violating token bucket are not used to replenish any other token bucket.
The other options given in the question, "normal", "peak", and "average", are not valid traffic conditions for SRDTB policing and are therefore not matched by this QoS mechanism.
