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

# Recent questions in Computer Networks

1 vote
1
Find the check bit in the message 111101 using HAMMING CODE? (1) 1101 (2) 0101 (3) 1001 (4) 0001
2
if 10 base 5 cable is used, then the signal strength is deter after propagating a distance of____________meter. Answer given is 500. I am not able to recall which formula is used in it.
3
Shall I cover token passing and aloha in flow control methods in computer network. Please suggest as I don't want to waste time if it's not in syllabus. Thanks
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Which of the following is/are true Firewalls can screen traffic going into or out of an organization. Virtual private networks can simulate an old leased network to provide certain properties. a)i only b) ii only c)neither d)both
1 vote
8
Consider A lives in Delhi, connected to the internet via a 100 Mbps connection retrieve a 250 KB webpage from server in Chennai where page contain 3 images of 500 KB each. Assume one way propagation delay is 75ms and A's access link is the bandwidth bottleneck for this ... to appear on A's screen using nonpersistent Http and T2 is time using persistent Http then,what are the values of T1 and T2?
9
Question: TCP opens a connection using an initial sequence number of 3500 and sends data at a rate of 5MBps. The other party opens a connection with a sequence number of 1200. Wrap around time for both sequence number differs by 12562.77 sec. Calculate the data rate (in KBps) ... $\frac{2^{_{32}}}{Bandwidth}$ Which one is correct?
10
While solving numerical problems of computer networks, I saw bandwidth of 1Kbps was taken as 1000bps. I was getting wrong answers as I was calculating using 1024bps. What is reason for taking K as 1000 and not 1024 in bandwidth?
11
I am getting answer as 9, someone please post their solution stepwise, that would be of great help to identify the mistake.
12
A packet has arrived in which the offset value of 2nd frame is 450, the header length is 20 and the value of the total length ﬁeld is 1000. What is the number of the ﬁrst byte in the first frame and the last byte in the last frame if the size of IP packet of size 3500 bytes?
13
Consider the following IP header(hexadecimal format) from an IP packet received, in which the checksum is set to 0. “4500 003C 1C46 4000 4006 0000 AC10 0A63 AC10 0A0C”. What is the checksum value calculated at destination? E419 B1E6 E6B1 4E19
14
Suppose you are designing a sliding window protocol for a $1Mbps$ point to point link which has one way latency of $1.25s$. Assuming that each frame carries $1kB$ of data, determine the minimum number of bits required for the sequence number. Answer provided - $9$ bits.
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Zero Subnet address is considered usable or reserved for GATE? Eg: If we have subnet id of 4 bit then what will be the 1st Subnet Address, ‘0000’ or ‘0001’?
1 vote
17
Consider an error-free $64\space kbps$ satellite channel used to send $512\space bytes$ data frames in one direction with very short acknowledgments back to another way. Assume the earth to satellite propagation time is $270\space msec$. What is the minimum window size so that the channel is fully utilized.
For GATE, Zero th subnet address is considered, useable or reserved? Suppose if we have, 3 subnet bit then what will be 5th subnet? Will it be 101 or 100? Which one will be considered in gate exam?