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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

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4203
interdomain routing
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3 votes
3 answers
4204
Calculating throughput for slotted ALOHA
Consider a system generating 20 bit frames and connected through a shared 20kbps channel. Find throughput in percent if slotted ALOHA is used and frame rate is 1000 fps.
Consider a system generating 20 bit frames and connected through a shared 20kbps channel. Find throughput in percent if slotted ALOHA is used and frame rate is 1000 fps.
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2 votes
1 answer
4205
Calculating frame length when bit rate, propagation delay(in bits) and length of link is given.
Assume CSMA/CD protocol. Find the least frame length in bytes for a 2 Mbps bit rate and 1.5km long network where propagation delay is 4.25 nano seconds per metre _______
Assume CSMA/CD protocol. Find the least frame length in bytes for a 2 Mbps bit rate and 1.5km long network where propagation delay is 4.25 nano seconds per metre _______
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1 votes
1 answer
4206
IPV4
Which of the following IP address requires approval from ISP for obtaining them? (i) 172.19.24.24 (ii) 13.13.13.13 (iii) 192.168.20.1 (iv) 192.167.0.1 Only (i) and (iii) Only (i) and (iv) Only (ii) and (iii) Only (ii) and (iv) why are these address special that they have to be approved from ISP?
Which of the following IP address requires approval from ISP for obtaining them?(i) 172.19.24.24 (ii) 13.13.13.13(iii) 192.168.20.1 (iv) 192.167.0.1Only (i) and (iii)O...
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1 answer
4211
ME Network1.1
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1 votes
1 answer
4212
find channel load
The measurement of slotted aloha channel with infinite number of users shows that 10% slots are idle. what is the channel load(G)?
The measurement of slotted aloha channel with infinite number of users shows that 10% slots are idle. what is the channel load(G)?
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4213
Solve the subnetting problem
An organization is granted the block 190.76.0.0/16. The administrator wants to create 1024 subnets using 10 bits. The first and last addresses in subnet 1024 respectively are?
An organization is granted the block 190.76.0.0/16. The administrator wants to create 1024 subnets using 10 bits. The first and last addresses in subnet 1024 respectively...
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1 answer
4214
Supernetting
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2 votes
1 answer
4215
Probability of Successful transmission
Q If probability of frame reaching safely is 0.1 then mean number of transmissions of a frame to make it success is _____. How to solve this question?
Q If probability of frame reaching safely is 0.1 then mean number of transmissions of a frame to make it success is _____.How to solve this question?
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0 votes
1 answer
4216
ROUTING TABLE 1.1
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2 votes
1 answer
4218
Digital Signature vs. Encryption?
in terms of confidentiality. digital signature ncrypts the message but doesnt provide confidentiality. WHY?
in terms of confidentiality.digital signature ncrypts the message but doesnt provide confidentiality.WHY?
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7 votes
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4220
Congestion Window 1.2
Consider the effect of using slow start on a link with 5 millisec round trip time and no congestion. The receiver window is 36 KB and the maximum segment size = 2 KB. The time (in milliseconds) before the first full window can be sent is ________.
Consider the effect of using slow start on a link with 5 millisec round trip time and no congestion. The receiver window is 36 KB and the maximum segment size = 2 KB. The...
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