Computer Networks · Data Link Layer
Official IIT answer key · IIT Kharagpur · Audited Aug 2026
GATE CSE 2014 Set 1 Q26 · NAT · 2 marks
Key concept
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Topic notes
Medium Access Control (MAC) in GATE CS is predominantly tested through quantitative numerical problems and conceptual protocol comparisons. The focus is split between random access protocols (CSMA/CD collision detection constraints and slotted ALOHA transmission probabilities), controlled access (Token Ring round-trip delays and token holding limits), and wireless MAC protocols (IEEE 802.11 CSMA/CA features, channels, and ACK mechanisms). Most questions carry 2 marks and appear in NAT format requiring unit conversions.
Full Data Link Layer guide →Consider a token ring network with a length of 2 km having 10 stations including a monitoring station. The propagation speed of the signal is 2 108 m/s and the token transmission time is ignored. If each station is allowed to hold the token for 2 , the minimum time for which the monitoring station should wait (in )before assuming that the token is lost is …
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Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.
