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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Take a full mock →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 · HARD
A TCP sender has a congestion window of 16 KB and an RTT of 100 ms. If the network can support a maximum throughput of 1 Mbps without loss, and the sender is in congestion avoidance phase, how many RTTs will it take for the congestion window to reach 24 KB?
Q3 · Computer Networks · MEDIUM
An organization is allocated the address block 172.16.64.0/20. The organization needs to create 8 subnets of equal size. What is the broadcast address of the 3rd subnet?
Q4 · Computer Networks · EASY
A network uses a subnet mask of 255.255.255.224. How many usable host addresses does each subnet support?
Q5 · 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?