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Computer Networks · Data Link Layer
Official IIT answer key · IIT Bombay · Audited Aug 2026
GATE CSE 2021 Set 1 Q8 · MCQ · 1 mark
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 the following two statements. S1 : Destination MAC address of an ARP reply is a broadcast address. S2 : Destination MAC address of an ARP request is a broadcast address. Which one of the following choices is correct?
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Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.