GATE CSE

Data Link Layer and Switching

Computer Networks

(Past Years Questions)

Marks 1

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A link has a transmission speed of 106 bits/sec. It uses data packets of size 1000 bytes each. Assume that the acknowled...
GATE CSE 2015 Set 2
A bit-stuffing based framing protocol uses an 8-bit delimiter pattern of 01111110. If the output bit-string after stuffi...
GATE CSE 2014 Set 3
The maximum window size for data transmission using the selective reject protocol with n-bit frame sequence numbers is:
GATE CSE 2005

Marks 2

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Consider a 128 × 103 bits/second satellite communication link with one way propagation delay of 150 milliseconds. Select...
GATE CSE 2016 Set 2
A sender uses the Stop-and-Wait ARQ protocol for reliable transmission of frames. Frames are of size 1000 bytes and the ...
GATE CSE 2016 Set 1
Consider a network connected two systems located 8000 kilometers apart. The bandwidth of the network is 500 × 106 bits p...
GATE CSE 2015 Set 3
Two hosts are connected via a packet switch with $${10^7}$$ bits per second links. Each link has a propagation delay of ...
GATE CSE 2015 Set 3
Two hosts are connected via a packet switch with 107 bits per second links. Each link has a propagation delay of 20 micr...
GATE CSE 2015 Set 2
Suppose that the stop-and-wait protocol is used on a link with a bit rate of 64 kilobits per second and 20 milliseconds ...
GATE CSE 2015 Set 1
Consider the store and forward packet switched network given below. Assume that the bandwidth of each link is 106 bytes/...
GATE CSE 2014 Set 2
Consider a selective repeat sliding window protocol that uses a frame size of 1 KB to send data on a 1.5 Mbps link with ...
GATE CSE 2014 Set 1
Let G(x) be the generator polynomial used for CRC checking. What is the condition that should be satisfied by G(x) to de...
GATE CSE 2009
Frames of 1000 bits are sent over a 106 bps duplex link between two hosts. The propagation time is 25 ms. Frames are to ...
GATE CSE 2009
Frames of 1000 bits are sent over a 106 bps duplex link between two hosts. The propagation time is 25 ms. Frames are to ...
GATE CSE 2009
The message 11001001 is to be transmitted using the CRC polynomial x3 + 1 to protect it from errors. The message that sh...
GATE CSE 2007
The distance between two stations M and N is L kilometers. All frames are K bits long. The propagation delay per kilomet...
GATE CSE 2007
Station A uses 32 byte packets to transmit messages to Station B using a sliding window protocol. The round trip delay b...
GATE CSE 2006
Station A needs to send a message consisting of 9 packets to Station B using a sliding window (window size 3) and go-bac...
GATE CSE 2006
In a packet switching network, packets are routed from source to destination along a single path having two intermediate...
GATE CSE 2005
Host A is sending data to host B over a full duplex link. A and B are using the sliding window protocol for flow control...
GATE CSE 2003

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