Computer Networks · TCP Flow and Congestion Control
Official IIT answer key · IISc Bangalore · Audited Aug 2026
GATE CSE 2024 Set 2 Q54 · NAT · 2 marks
Key concept
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Topic notes
GATE CS tests TCP across three primary areas: congestion control dynamics (window growth phases, timeout recovery, and round-by-round segment tracking), sequence number wrap-around time and bit-budget calculations against MSL, and connection lifecycle mechanics (3-way handshake flags, state transitions during active/passive close, and crash recovery with RST segments). Questions are balanced between computational NATs involving RTTs and discrete bit math, and conceptual MSQ/MCQs focusing on byte-stream mechanics, piggybacking, and RFC 793 protocol invariants.
Full TCP Flow and Congestion Control guide →Consider a TCP connection operating at a point of time with the congestion window of size 12 MSS (Maximum Segment Size), when a timeout occurs due to packet loss. Assuming that all the segments transmitted in the next two RTTs (Round Trip Time) are acknowledged correctly, the congestion window size ( in MSS) during the third RTT will be …
Topic-wise GATE CS PYQs with verified steps
Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.
