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Concept of layering. LAN technologies (Ethernet).Flow and error control techniques, Swithing. IPv4/ IPv6, Routers and routing algorithms (distance vector, link state). TCP/UDP and Sockets, Congestion control. Application layer protocols (DNS, SMTP, POP, FTP, HTTP). Basics of Wi-Fi. Network security: authentication, basics of public key and private key cryptography, digital signatures and certificates, Firewalls.

$$\small{\overset{{\large{\textbf{Mark Distribution in Previous GATE}}}}{\begin{array}{|c|c|c|c|c|c|c|c|}\hline
\textbf{Year}&\textbf{2019}&\textbf{2018}&\textbf{2017-1}&\textbf{2017-2}&\textbf{2016-1}&\textbf{2016-2}&\textbf{Minimum}&\textbf{Average}&\textbf{Maximum}
\\\hline\textbf{1 Mark Count}&1&3&2&3&2&3&1&2.3&3
\\\hline\textbf{2 Marks Count}&4&2&3&1&4&3&1&2.8&4
\\\hline\textbf{Total Marks}&9&7&8&5&10&9&\bf{5}&\bf{8}&\bf{10}\\\hline
\end{array}}}$$

Recent questions in Computer Networks

0 votes
0 answers
1
In the given network system, station A needs to send a payload of 1600 B from its network layer to station B. If fragmentation is done, then the actual data size to be transmitted is ______________
asked Jan 18, 2019 in Computer Networks MiNiPanda 274 views
2 votes
0 answers
2
In the given network system, station A needs to send a payload of 1600B from its network layer to station B. If fragmentation is done, then the actual data size to be transmitted is?
asked Jan 18, 2019 in Computer Networks Somoshree Datta 5 290 views
0 votes
1 answer
3
Consider a TCP connection between two machines (A and B) in an environment with 0% packet loss. Assume the round trip time (RTT) between the two machines is 4 [seconds], and the segment size is 3 [Kbytes]. The bandwidth of the connection is 500 [kbps]. What is the ... buffer close to zero. I.e., TCP packets are continuously, back-to-back, sent out of the sender before the first ack arrives back.)
asked Jan 18, 2019 in Computer Networks jatin khachane 1 124 views
0 votes
0 answers
4
A system uses selective repeat protocol with window size of 4. If each packet carries 5000 bits , then the time taken to tranfer 5 milion bits of data, if the distance between sender and receiver is 2500km , the propagation speed is 2* 10^8 m/s and data rate is 1Mbps. We assume no data or ACK is lost
asked Jan 18, 2019 in Computer Networks jatin khachane 1 54 views
0 votes
1 answer
5
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6
answer given as 255.255.255.254 how it is correct please check??
asked Jan 17, 2019 in Computer Networks eyeamgj 78 views
0 votes
1 answer
7
A Selective Repeat ARQ is using 7 bits to represent the sequence numbers.The maximum window size is __________. (ans is 64) why It is
asked Jan 17, 2019 in Computer Networks MRINMOY_HALDER 294 views
0 votes
0 answers
8
Consider the following statements: S1: In ethernet, jamming signal ensure that all nodes using the channel are aware for their transmission(s) failed. S2: Bit stuffing ensures that all frames are of the same size. Which of the following is true? (a) Only S1 (b) Only S2 © Both S1 and S2 (d) Neither S1 nor S2
asked Jan 17, 2019 in Computer Networks Somoshree Datta 5 71 views
0 votes
0 answers
9
1 vote
1 answer
11
Let us consider a scenario of sending real-time voice from Host A to Host B over a packet-switched network. Host A converts analog voice to a digital $32$ kbps bit stream on the fly. Host A then groups the bits into $44$-byte packets. There is one link between Hosts A and B; its ... A) until the bit is decoded (as part of the analog signal at Host B)? $11$ ms $88$ ms $30$ ms $30.088$ ms
asked Jan 16, 2019 in Computer Networks Applied Course 129 views
0 votes
0 answers
12
Consider a TCP connection between two machines (A and B) in an environment with 0% packet loss. Assume the round trip time (RTT) between the two machines is 4 [seconds], and the segment size is 3 [Kbytes]. The bandwidth of the connection is 500 [kbps]. What is ... to be mentioned as minimum possible window size.. Can this be possible plz explain me how to solve this problem if it is correct .
asked Jan 16, 2019 in Computer Networks Prasad Budithi 89 views
1 vote
0 answers
13
If TCP RTT is currently 20 ms and following acknowledgement come in after 22,24 and 23 ms respectively. What is new RTT estimate ? 28.527 28.82 20.82 21.22
asked Jan 16, 2019 in Computer Networks Na462 176 views
0 votes
0 answers
14
A leaky Bucket with capacity 200MB is at host network interface. The data rate on the network is 2MBps. If the Host has 450 MB to send on the network and it sends data in a burst, then the maximum data speed from the host in order that no data is lost is ______MBps
asked Jan 16, 2019 in Computer Networks dharmesh7 41 views
0 votes
0 answers
15
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 decimal value of last octet of last host of sixth subnet is __________
asked Jan 16, 2019 in Computer Networks pream sagar 72 views
1 vote
0 answers
16
A token bucket scheme is used for traffic shaping. a new token is put into the bucket at every 10 micro second. assume each token pick one packet which contain 2B of data. it is observed that initial capacity of bucket is 10 Mb. the computer can transmit at full speed of 8 Mbps for ... ) = MT what is R? is it token arriving rate (0.1M/s) or data transmitted equivalent to token (16bits * 0.1M/s) ?
asked Jan 15, 2019 in Computer Networks Rahul_Rathod_ 412 views
0 votes
0 answers
17
What is optimal and Estimated Cost here, and why eliminate option A and C, why option B is correct.
asked Jan 15, 2019 in Computer Networks Raja Rawal 150 views
0 votes
0 answers
18
this is a c function which adds the newly created node at the end(tail) of link list . this node is pointed by q and next of this node is already null. struct *node *add(struct node*head ,struct node *q) the number of ways to fill the boxes so function works correctly ... : while how second is true becz when on;ly one node in list then second will fail ..answer is given as 1 and 2 are true .
asked Jan 15, 2019 in Computer Networks eyeamgj 63 views
0 votes
0 answers
19
a group of n stations share a 100kbps pure aloha channel .each station outputs a 1000B frame on average every 50 sec . the maximum value of N? answer given as 920 but i am getting 115 please check
asked Jan 15, 2019 in Computer Networks eyeamgj 87 views
4 votes
0 answers
20
Consider a TCP connection using the multiplicative additive congestion control algorithm where the window size is 1 MSS and the threshold is 32 MSS. At the $8^{th}$ transmission timeout occurs and enters in the congestion detection phase. The value of the window size (in MSS) at the ... end of $12^{th}$ transmission. So we have to take the window size after the 12 RTTs right and not at 12th RTT?
asked Jan 15, 2019 in Computer Networks MiNiPanda 506 views
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