200-101 Question #54: Real Exam Question with Answer & Explanation

The correct answer is D: All traffic exceeding the CIR is marked discard eligible.. The CIR (Committed Information Rate) is the guaranteed bandwidth a service provider commits to for a Frame Relay PVC. When traffic exceeds the CIR, the Frame Relay network marks the excess frames with the DE (Discard Eligible) bit set to 1. This applies to all traffic beyond the

Question

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

Options

AAll TCP traffic is marked discard eligible.
BAll UDP traffic is marked discard eligible and a BECN is sent.
CAll TCP traffic is marked discard eligible and a BECN is sent.
DAll traffic exceeding the CIR is marked discard eligible.

Explanation

The CIR (Committed Information Rate) is the guaranteed bandwidth a service provider commits to for a Frame Relay PVC. When traffic exceeds the CIR, the Frame Relay network marks the excess frames with the DE (Discard Eligible) bit set to 1. This applies to all traffic beyond the CIR - not just TCP or UDP specifically. Frames with DE=1 are the first to be dropped if congestion occurs in the network. BECN (Backward Explicit Congestion Notification) is a separate mechanism triggered by actual network congestion, not simply by exceeding the CIR.

Community Discussion

No community discussion yet for this question.

Full 200-101 Practice