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GATE CS 2021: Computer Network Rapid Quiz-1 (App update required to attempt this test)
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Question 1
A 200 km long trunk is used to transmit frames using a Go-Back-N protocol, the propagation speed is 5 microsec/km and trunk data rate is 1.5 Mbps and frame size is 32 bytes.
In order to achieve 100 % efficiency what is the maximum window size at the sender’s side?
Question 2
Let a TCP connection is transferring a 6000 Bytes, 1st byte is numbered as 10010, if data are sent in 5 segments with the first 4 segments carrying 1000 Bytes and the last segment carrying 2000 Bytes then number of the last byte send is ___________?
Question 3
Suppose a router receives an IP packet containing 500 data bytes and has to forward the packet to a network with maximum transmission unit of 150 bytes. Assume that IP header is 20 bytes long. What are fragment offset value for 2nd packet?
Question 4
Consider sending a large file of F bits from node A to node B. There are three links (and two switches) between A and B, and the links are uncongested (that is, no queuing delays). Node A segments the file into segments of S bits each and adds 80 bits of header to each segment, forming packets of L = 80 + S bits. Each link has a transmission rate of R bps. Find the value of S that minimizes the delay of moving the file from node A to node B. Ignore the propagation delay.
Question 5
Assume a token bucket is used for traffic shaping. A new token is put into the bucket at every 10 μsec. One data packet of 3 bytes are consumed by each token. Initially, the capacity of the token bucket is 15 Mbit. The transmission device can transmit at the full speed of 7 mbps for ____. (up to 2 decimal places)
Question 6
Which of the following is true?
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Dec 23GATE & PSU CS