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Computer Networks · CIDR Notation
Official IIT answer key · IIT Roorkee · Audited Aug 2026
GATE CSE 2026 Set 1 Q56 · MSQ · 2 marks
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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 →An ISP having an address block 202.16.0.0/15 assigns a block of 6000 IP addresses to a client, using the classless internet domain routing (CIDR) super-netting approach. Which of the following address blocks can be assigned by the ISP?
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