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A Frame Relay network is sending frames that exceed the Committed Information Rate (CIR), what action would the Frame Relay switch take to solve any possible congestion?
A Forward Explicit Congestion Notification (FECN) is sent and all UDP traffic is marked as Discard Eligible (DE).
Frames that exceed the CIR are marked as Discard Eligible (DE), and are dropped in case congestion occurs.
When CIR is exceeded all TCP traffic is marked as Discard Eligible (DE) and all transmitted and received frames are dropped until congestion is resolved.
A Backward Explicit Congestion Notification (BECN) is sent and all TCP traffic is marked as Discard Eligible (DE).
A Forward Explicit Congestion Notification (FECN) will be sent to all devices in the Frame Relay network, making all devices stop sending redundant traffic.
A Frame Relay provider will guarantee to maintain an agreed date rate. The Committed Information Rate (CIR) is the maximum agreed transmission rate, any frames that are sent in excess of the CIR are marked as Discard Eligible (DE), and they will be dropped in case congestion occurs. For more information refer to: http://en.wikipedia.org/wiki/FrameRelay#Committedinformationrate.28CIR.29
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