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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

1 votes
1 answer
4161
What is keylogger?
Under what category is it classified?
Under what category is it classified?
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0 votes
0 answers
4162
What is keylogger?
Under what category is it classified?
Under what category is it classified?
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4 votes
5 answers
4164
For a class C network if IP address of a computer is 200.99.39.112 and subnet mask is 255.255.255.224
For a class C network if IP address of a computer is 200.99.39.112 and subnet mask is 255.255.255.224 the first host of first subnet (represent last octet) is ________. M...
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0 votes
1 answer
4165
Calculating RTO timer
How to calculate RTO value Given: Initial RTT 20ms next round trip 40ms aplpha is 0.5
How to calculate RTO valueGiven:Initial RTT 20msnext round trip 40msaplpha is 0.5
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4 votes
1 answer
4166
Leaky bucket
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1 votes
1 answer
4169
The order of packets
Five segments of data of sizes 100B , 400B , 200B , 300B and 50B are sent using TCP and PSH bit is set on each of the segments. There are no retransmission timeouts. The acks received are 101,101, 701,701, and 1051. In which order are the segments received
Five segments of data of sizes 100B , 400B , 200B , 300B and 50B are sent using TCP and PSH bit is set on each of the segments. There are no retransmission timeouts. The ...
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3 votes
1 answer
4170
Calculating maximum throughput for given window size
Given solution of the problem: I was thinking of using this formula, $\eta = \frac{N}{1+2a}$ for this question. What is wrong in using it. Please explain
Given solution of the problem:I was thinking of using this formula, $\eta = \frac{N}{1+2a}$ for this question. What is wrong in using it. Please explain
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0 votes
0 answers
4172
Firewall
in what way does a firewall increase security of VPN? a)configured to allow certain ports to access VPN b)restrict use of specific application software on network c)limit speed in which transmission of data is carried out
in what way does a firewall increase security of VPN?a)configured to allow certain ports to access VPNb)restrict use of specific application software on networkc)limit s...
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0 votes
0 answers
4173
Computer Network Formulas
I am confused about efficiency formulas of ethernet,standard ethernt,csma cd ,sliding window? Will you please list down some formulas?
I am confused about efficiency formulas of ethernet,standard ethernt,csma cd ,sliding window?Will you please list down some formulas?
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0 votes
0 answers
4174
overhead
how to approach
how to approach
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0 votes
0 answers
4175
Ip addresses and Gate Calculator
Is there any way of calculating binary equivalent of the given IP address on the virtual calculator provided? Or we need to use manual calculations for it?
Is there any way of calculating binary equivalent of the given IP address on the virtual calculator provided? Or we need to use manual calculations for it?
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1 votes
1 answer
4176
Supernetting in CIDR
Can i perform superneting and perform these addresses ? 100.1.2.0/25 100.1.2.128/26 100.1.2.192/26
Can i perform superneting and perform these addresses ?100.1.2.0/25100.1.2.128/26100.1.2.192/26
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1 votes
1 answer
4177
tcp-max no of segments
Let a file of 16 GB has to be transferrred from host A to host B. Assume an MSS size of 2048B. Then what is maximum number of segments that can be transferred such that TCP sequence no don't get exhausted.Assume TCP sequence field 32 bits a)2^21 b)2^23 c)2^11 d)none
Let a file of 16 GB has to be transferrred from host A to host B. Assume an MSS size of 2048B. Then what is maximum number of segments that can be transferred such that ...
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0 votes
1 answer
4178
TCP and IP overhead
Suppose a TCP entity receive 2MB file from application layer and IP layer is willing to carry blocks of max size 1600 B. Calculate amount of overhead incurred from segmenting file into packet sized units. Assume both TCP and IP header of 20 B.
Suppose a TCP entity receive 2MB file from application layer and IP layer is willing to carry blocks of max size 1600 B. Calculate amount of overhead incurred from segmen...
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0 votes
0 answers
4179
TCP retransmission timer
If TCP round trip time is currently 20 ms and ACK comes in after 30 ms then what is the timeout period for next transmission . Use α=0.9 and β=2
If TCP round trip time is currently 20 ms and ACK comes in after 30 ms then what is the timeout period for next transmission . Use α=0.9 and β=2
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0 votes
0 answers
4180
Width of bit in link
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