What occurs on a Frame Relay network when the CIR is exceeded?

What occurs on a Frame Relay network when the CIR is exceeded?
A . All TCP traffic is marked discard eligible.
B . All UDP traffic is marked discard eligible and a BECN is sent.
C . All TCP traffic is marked discard eligible and a BECN is sent.
D . All traffic exceeding the CIR is marked discard eligible.

Answer: D

Explanation:

Committed information rate (CIR): The minimum guaranteed data transfer rate agreed to by the Frame Relay switch. Frames that are sent in excess of the CIR are marked as discard eligible (DE) which means they can be dropped if the congestion occurs within the Frame Relay network.

Note: In the Frame Relay frame format, there is a bit called Discard eligible (DE) bit that is used to identify frames that are first to be dropped when the CIR is exceeded.

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