642-642 무료 덤프문제 온라인 액세스

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What is the purpose of the qos pre-classify command?

• A.to enable the IOS to classify the packet based on the original IP header instead of the tunnel IP header
• B.to enable class-based marking on tunnel interface
• C.to enable the IOS to copy the ToS field from the original IP header to the outer tunnel IP header
• D.to enable class-based marking on IPSec crypto maps
• E.to enable the IOS to classify the packet based on the outer tunnel IP header instead of the original IP header
• F.to enable the IOS to copy the ToS field from the outer tunnel IP header back into the original IP header

In which two locations is the qos pre-classify command applied to support QoS preclassification over an IPSec/GRE tunnel? (Choose two.)

• A.the crypto map
• B.the tunnel interface
• C.the class-map
• D.the policy-map
• E.the physical interface

Which three characteristics are drawbacks to the use of a best-effort with over-provisioning backbone design? (Choose three.)

• A.Unplanned network failures can cause unexpected congestion in the network.
• B.The design uses a different over-provisioning ratio for the different traffic classes.
• C.Denial of Service attacks on one service can affect all network traffic.
• D.It requires complex QoS mechanisms at the network core.
• E.The design costs more to implement than a DiffServ backbone.
• F.It requires complex QoS mechanisms at the network edge.

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