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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.

.$$\scriptsize{\overset{{\large{\textbf{Mark Distribution in Previous GATE}}}}{\begin{array}{|c|c|c|c|c|c|c|c|}\hline
\textbf{Year}& \textbf{2024-1} & \textbf{2024-2} & \textbf{2023}&  \textbf{2022} & \textbf{2021-1}&\textbf{2021-2}&\textbf{Minimum}&\textbf{Average}&\textbf{Maximum}
\\\hline\textbf{1 Mark Count} & 3&3&2& 2 &1&1&1&2&3
\\\hline\textbf{2 Marks Count} & 3&3&3& 4 &4&3&3&3.33&4
\\\hline\textbf{Total Marks} & 9&9&8& 10 &9&7&\bf{7}&\bf{8.67}&\bf{10}\\\hline
\end{array}}}$$

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Recent questions in Computer Networks

#4421
746
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1 answers
0 votes
network general
Which type of ACK is used in 802.5?Response: Cumulative ACK Independent ACK Piggybacking ACK None of these
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#4422
6.9k
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5 answers
0 votes
how many bits fit in a cable
A 100 Km long cable runs at 154 Mbps data rate. The prop speed in the cable is 2/3 of light. how many bits fit in the cable ?1) 7722) 7003) 7824) 770
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#4423
2.0k
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1 answers
1 votes
There are 200 computers in a lab which are attached to an ethernet 10 Mbps with a coaxial cable of 1500m .The packets are 800 bits long/ The propagation speed is 2*10^8 m/sec. On avg how many packets can each comp. send per second ?
There are 200 computers in a lab which are attached to an ethernet 10 Mbps with a coaxial cable of 1500m .The packets are 800 bits long. The propagation speed is 2*10 ... Options 1) 42 packets/sec 2) 44 packets/sec 3) 62 packets/sec 4) None
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#4424
5.3k
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5 answers
0 votes
A host with IP address 10.100.100.100 wants to use loopback testing,WHAT are the source and destination addresses?
1. 10.100.100.100 & 10.100.100.1002. 10.100.100.100 & 255.255.255.2553. 10.100.100.100 & 127.1.100.14. 127.100.100.100 & 10.100.100.100
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#4425
2.1k
views
1 answers
1 votes
propagation delay
Two hosts are connected via a packet switch with 107 bits per second links. Each link has a propagation delay of 20 microseconds. The switch begins forwarding a ... and the reception of the last bit of the data in microseconds is _____.
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#4426
17.1k
views
5 answers
48 votes
GATE CSE 2015 Set 3 | Question: 38
In the network $200.10.11.144/27$, the $\text{fourth}$ octet (in decimal) of the last $\text{IP}$ address of the network which can be assigned to a host is _______.
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#4427
34.6k
views
11 answers
108 votes
GATE CSE 2015 Set 3 | Question: 36
Two hosts are connected via a packet switch with $10^7$ bits per second links. Each link has a propagation delay of $20$ microseconds. The switch begins ... data and the reception of the last bit of the data in microseconds is ______.
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#4428
15.2k
views
10 answers
47 votes
GATE CSE 2015 Set 3 | Question: 28
Consider a network connecting two systems located $8000$ $\text{Km}$ apart. The bandwidth of the network is $500 \times 10^6$ $\text{bits}$ per second. The ... . Then, the minimum size in bits of the sequence number field has to be ______.
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#4429
12.8k
views
4 answers
41 votes
GATE CSE 2015 Set 3 | Question: 22
Consider the following statements.TCP connections are full duplexTCP has no option for selective acknowledgementTCP connections are message streamsOnly I is correctOnly I and III ... II and III are correctAll of I, II and III are correct
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#4430
14.6k
views
8 answers
31 votes
GATE CSE 2015 Set 3 | Question: 6
Consider a CSMA/CD network that transmits data at a rate of $100\;\textsf{Mbps}\; (10^8\;\text{bits}$ per second) over a $1\;\textsf{km}$ (kilometre) ... $ in the cable?$8000$10000$16000$20000$
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#4431
27.3k
views
6 answers
37 votes
GATE CSE 2015 Set 1 | Question: 53
Suppose that the stop-and-wait protocol is used on a link with a bit rate of $64$ $\text{kilobits}$ per second and $20$ $\text{milliseconds}$ ... bytes to achieve a link utilization of at least $50$ $\text{%}$ is_________________.
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#4432
27.2k
views
9 answers
76 votes
GATE CSE 2015 Set 2 | Question: 52
$\text{Host A}$ sends a $\text{UDP}$ datagram containing $8880\text{ bytes}$ of user data to $\text{host B}$ over an $\text{Ethernet LAN}.$ Ethernet frames may carry ... $ and $925$6$ and $7400$7$ and $1110$7$ and $8880$
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#4433
14.2k
views
9 answers
46 votes
GATE CSE 2015 Set 1 | Question: 29
Consider a LAN with four nodes $S_1, S_2, S_3,$ and $S_4$. Time is divided into fixed-size slots, and a node can begin its transmission ... frame in the first slot without any collision by any of these four stations is__________________.
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#4434
7.9k
views
3 answers
21 votes
GATE CSE 2015 Set 1 | Question: 21
Suppose that everyone in a group on $N$ people wants to communicate secretly with the $(\text{N - 1})$ others using symmetric Key cryptographic system. The communication between any two person ... $N(N-1)$\dfrac{N(N-1)}{2}$(N-1)^{2}$
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#4435
10.5k
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7 answers
35 votes
GATE CSE 2015 Set 1 | Question: 22
Which of the following fields of an IP header is NOT modified by a typical IP router?Check sumSource addressTime to Live (TTL)Length
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#4436
19.4k
views
9 answers
47 votes
GATE CSE 2015 Set 1 | Question: 1‏9
Suppose two hosts use a TCP connection to transfer a large file. Which of the following statements is/are FALSE with respect to the TCP connection?If the ... to the advertised window.III onlyI and III onlyI and IV onlyII and IV only
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#4437
14.3k
views
2 answers
36 votes
GATE CSE 2015 Set 1 | Question: 1‏7
In one of the pairs of protocols given below , both the protocols can use multiple $\textsf{TCP}$ connections between the same client and the server. Which one is that ... , FTP}$\textsf{HTTP, TELNET}$\textsf{FTP, SMTP}$\textsf{HTTP, SMTP}$
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#4438
15.3k
views
5 answers
27 votes
GATE CSE 2015 Set 2 | Question: 41
Consider the following routing table at an IP router: ... {i-b, ii-c, iii-d, iv-e}$\text{i-b, ii-c, iii-e, iv-d}$
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#4439
28.5k
views
5 answers
71 votes
GATE CSE 2015 Set 2 | Question: 34
Assume that the bandwidth for a $\text{TCP}$ connection is $1048560$ bits/sec. Let $\alpha$ be the value of RTT in milliseconds (rounded off to the nearest integer) after ... $ $\times $2$^{14}$500$ milliseconds, $65535$ $\times $2$^{16}$
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#4440
9.9k
views
4 answers
28 votes
GATE CSE 2015 Set 2 | Question: 20
Identify the correct order in which a server process must invoke the function calls accept, bind, listen, and recv according to UNIX socket API. ... textsf{bind, accept, listen, recv}$\textsf{accept, listen, bind, recv}$
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