Computer Networks · IPv4 Fragmentation
Official IIT answer key · IIT Guwahati · Audited Aug 2026
GATE CSE 2025 Set 2 Q23 · MCQ · 1 mark
Key concept
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Topic notes
IPv4 Fragmentation in GATE CS is tested through a balanced mix of quantitative fragmentation calculations and conceptual questions regarding packet forwarding semantics. Numerical items focus on calculating the number of fragments and last fragment sizes across single or multi-hop links with varying MTUs, strictly enforcing the 8-byte offset boundary rule. Conceptual items assess router-level operations, identifying where fragmentation happens (source and intermediate routers), where reassembly occurs (destination host only), and transport layer interactions (UDP/TCP header placement and segment-level retransmission).
Full IPv4 Fragmentation guide →Consider a network that uses Ethernet and IPv4. Assume that IPv4 headers do not use any options field. Each Ethernet frame can carry a maximum of 1500 bytes in its data field. A UDP segment is transmitted. The payload (data) in the UDP segment is 7488 bytes. Which ONE of the following choices has the CORRECT total number of fragments transmitted and the size of the last fragment including IPv4 header?
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.
