GATE CSE · Computer Science and Information Technology

Computer Networks

Layering models; data link, network, transport and application layers; routing protocols; IP addressing and support protocols.

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  • Q1 · Computer Networks · EASY

    A network uses CSMA/CD with a transmission rate of 100 Mbps and a cable length of 2 km. If the propagation speed is 2 × 10⁸ m/s, what is the minimum frame size in bits to ensure collision detection?

  • Q2 · Computer Networks · EASY

    A network uses a subnet mask of 255.255.255.224. How many usable host addresses does each subnet support?

  • Q3 · Computer Networks · MEDIUM

    In a Go-Back-N ARQ protocol with a window size of 7, if frame 4 is lost during transmission, which frames will the sender retransmit after detecting the loss?

  • Q4 · Computer Networks · HARD

    A TCP connection has a round-trip time (RTT) of 100 ms and uses a window size of 64 KB. Assuming no packet loss and ignoring protocol overhead, what is the approximate maximum throughput achievable?

  • Q5 · Computer Networks · EASY

    Which layer of the OSI model is responsible for end-to-end error recovery and flow control?

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