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Computer Networks · CIDR Notation
Official IIT answer key · IIT Guwahati · Audited Aug 2026
GATE CSE 2025 Set 1 Q40 · MCQ · 2 marks
Key concept
Topic notes
In GATE CS, CIDR notation is tested as a core network-layer mechanism combining binary arithmetic, bitwise masking, and address boundary alignment. Questions predominantly evaluate Longest Prefix Match (LPM) packet forwarding across routing tables, route aggregation/supernetting validity, and host capacity calculations. Recent years emphasize Multi-Select Questions (MSQs) and numerical calculations (NATs) requiring rigorous validation of power-of-two block alignments.
Full CIDR Notation guide →Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.