GATE 2024 Computer Network Foundation Quiz 75

A channel has a bit rate of 20 kbps and a propagation delay of 200 ms. What is the frame size required to transmit in order to give an efficiency of 50%? (in bytes)

Suppose we are designing a sliding Window Protocol (SWP) for a 1-Mbps link (point to point) to a stationary satellite revolving around the earth at 6×10⁴ km altitude. Assume that each frame carries 1kB of data and the speed of light is 3×10⁸ m/s. Then find the number of bits needed for the sequence number field if RWS =1.

The message 100011011 is to be transmitted using the CRC polynomial

x³ + x² + 1 to protect it from errors. The message that should be transmitted is _____.

Which of the physical connection is the fastest for transmission of data signal?

Consider the Go Back N protocol with a sender's window size of 4. Suppose at time 't', the next in order packet the receiver is expecting has a sequence number of 15. Assume that the medium does not reorder messages. What are the possible sets of sequence numbers inside the sender's window at time 't’? [Assume that the sender has already received the ACK.]