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Concept of layering.OSI and TCP/IP Protocol Stacks; Basics of packet, circuit and virtual circuit-switching; Data link layer: framing, error detection, Medium Access Control, Ethernet bridging; Routing protocols: shortest path, flooding, distance vector and link state routing; Fragmentation and IP addressing, IPv4, CIDR notation, Basics of IP support protocols (ARP, DHCP, ICMP), Network Address Translation (NAT); Transport layer: flow control and congestion control, UDP, TCP, sockets; Application layer protocols: DNS, SMTP, HTTP, FTP, Email.

.$$\scriptsize{\overset{{\large{\textbf{Mark Distribution in Previous GATE}}}}{\begin{array}{|c|c|c|c|c|c|c|c|}\hline
\textbf{Year}& \textbf{2022} & \textbf{2021-1}&\textbf{2021-2}&\textbf{2020}&\textbf{2019}&\textbf{2018}&\textbf{2017-1}&\textbf{2017-2}&\textbf{2016-1}&\textbf{2016-2}&\textbf{Minimum}&\textbf{Average}&\textbf{Maximum}
\\\hline\textbf{1 Mark Count} & 2 &1&1&2&1&3&2&3&2&3&1&2&3
\\\hline\textbf{2 Marks Count} & 4 &4&3&2&4&2&3&1&4&3&1&3&4
\\\hline\textbf{Total Marks} & 10 &9&7&6&9&7&8&5&10&9&\bf{5}&\bf{8}&\bf{10}\\\hline
\end{array}}}$$

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Recent questions in Computer Networks

2 votes
1 answer
4303
RSA Algorithm
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2 votes
0 answers
4304
SHA 1 hash algo. create N-bit message digest out of a message of 512bit blocks. So is has a message digest of_?
SHA 1 hash algo. create N-bit message digest out of a message of 512bit blocks. So is has a message digest of_?A.4 words of 32bitsB.5 words of 32bitsC.16 words of 32bitsD...
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1 votes
1 answer
4308
How to solve large exponential using fast exponential modular arithmetic?
How to solve modulus of large exponential like 191^15 mod 719 using fast modular arithmetic with left to right binary form.
How to solve modulus of large exponential like 191^15 mod 719 using fast modular arithmetic with left to right binary form.
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3 votes
2 answers
4309
TCP, find avg no of packet in queue..?
Consider a $10^{7}$ bps link that is $400$km long, with a queue large enough to hold $2000$ packets. Assume that packets arrive at the queue with an average rate of $4000$ packets per second and that the average packet length is $2000$ bits. Find the average number of packets in the queue?
Consider a $10^{7}$ bps link that is $400$km long, with a queue large enough to hold $2000$ packets. Assume that packets arrive at the queue with an average rate of $4000...
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3 votes
1 answer
4310
madeeasy test TCP total overhead
What is the total over header bits (Headers & Retransmission) with data frames consisting of $40$ bit header and $3960$ data bits. ACK frames never occur. NAK frames are $40$ bits, the error rate for frame is $2$% and for NAK frame is negligible. $80.4$ $80.8$ $160.4$ None of these.
What is the total over header bits (Headers & Retransmission) with data frames consisting of $40$ bit header and $3960$ data bits. ACK frames never occur. NAK frames are ...
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2 votes
3 answers
4311
An Acknowledgement by TCP at sender guarantees?
1.Data has been delivered to the application. 2.Date has been received by TCP module. 3.Data has been received by the Application interface. 4.None What should be the answer?? I think 1st and 3rd are correct?!
1.Data has been delivered to the application.2.Date has been received by TCP module.3.Data has been received by the Application interface.4.NoneWhat should be the answer?...
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3 votes
1 answer
4312
How many TCP connections can be opened between two ports?
Is it only single TCP connection or Multiple connections?
Is it only single TCP connection or Multiple connections?
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13 votes
5 answers
4313
Formula for calculating efficiency of ethernet
What formula to use for calculating efficiency of ethernet is it $\frac{1}{1+6.44a}$ or $\frac{1}{1+5.44a}$ or $\frac{1}{1+5a}$​ I saw three versions for calculating the same thing in different places. I want to know which one is correct.
What formula to use for calculating efficiency of ethernet is it $\frac{1}{1+6.44a}$ or $\frac{1}{1+5.44a}$ or $\frac{1}{1+5a}$​I saw three versions for calculating...
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1 votes
1 answer
4318
Ethernet Related
If an Ethernet station collides 3 times in trying to transmit a single frame, how long might it wait before the next attempt? A]786 Micro seconds B]819.2 Micro seconds C]409.6 Micro seconds D]None of these
If an Ethernet station collides 3 times in trying to transmit a single frame, how long might it wait before the next attempt?A]786 Micro secondsB]819.2 Micro secondsC]409...
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0 votes
1 answer
4319
Sliding Window Protocol related
Consider a Sliding Window Protocol for a 10MBps point- to -point link with propagation delay of 2sec. If frame size is 4 kB. The minimum number of bits required for the sequence number is what?
Consider a Sliding Window Protocol for a 10MBps point- to -point link with propagation delay of 2sec. If frame size is 4 kB. The minimum number of bits required for the s...
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3 votes
4 answers
4320
stop and wait ARQ
In stop and wait ARQ system bandwidth delay product is 80000 bits..1 bit takes 20 ms to make round trip..if link utilization is only 10%,then what is size of frame in bytes?
In stop and wait ARQ system bandwidth delay product is 80000 bits..1 bit takes 20 ms to make round trip..if link utilization is only 10%,then what is size of frame in byt...
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