Recent questions and answers in Computer Networks

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1

computer network
A 60km long channel operates at 1Mbps and is used to transmit 60-byte frames. If the propagation speed is 8 micro second /km, then how many bits will be needed to represent sequence numbers?

asked 9 hours ago in Computer Networks by gaja (9 points) | 19 views

0 votes

0 answers

2

computer networks
Consider sliding window protocol for a 10-MBPS Channel with propagation delay of 300 micro second. If packet size is 1KB then What is the maximum utilization for window size 127?

asked 9 hours ago in Computer Networks by gaja (9 points) | 9 views

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1 answer

3

GATEBOOK-2019-CN2-15
A block of addresses is granted to a small organization. We know that one of the addresses is 205.16.37.39/28. Which of the following address can not be part of that organization? 205.16.37.37 205.16.37.47 205.16.37.52 205. 16.37. 43

answered 13 hours ago in Computer Networks by Manoja Rajalakshmi A Active (4.5k points) | 14 views

0 votes

1 answer

4

GATEBOOK-2019-CN2-17
An IP fragment has arrived with an offset value of 100. How many bytes of data were originally sent by the source before the data in this fragment? 100 800 400 200

answered 13 hours ago in Computer Networks by Manoja Rajalakshmi A Active (4.5k points) | 10 views

0 votes

1 answer

5

GATEBOOK-2019-CN2-16
A host is sending 100 datagrams each of size 100 bytes to another host. If the identification number of the first datagram is 1024, what is the identification number of the last? 1124 11023 11024 1123

answered 13 hours ago in Computer Networks by Manoja Rajalakshmi A Active (4.5k points) | 11 views

0 votes

1 answer

6

GATEBOOK-2019-CN2-8
Suppose that instead of using 16 bits for the network part of a class B address originally, 20 bits had been used. How many class B networks would there have been? 262144 262142 1048756 1048754

answered 13 hours ago in Computer Networks by Manoja Rajalakshmi A Active (4.5k points) | 24 views

0 votes

1 answer

7

GATEBOOK-2019-CN2-13
The number of addresses in a range, if the first address is 146.102.29.0 and the last address is 146.102.32.255 is ___

answered 14 hours ago in Computer Networks by Manoja Rajalakshmi A Active (4.5k points) | 16 views

0 votes

1 answer

8

GATEBOOK-2019-CN2-11
IPv6 uses 16-byte addresses. If a block of 1 million addresses is allocated every picosecond, how long will the addresses last? A. years B. years C. years D. years

answered 14 hours ago in Computer Networks by Arjun Veteran (363k points) | 27 views

+2 votes

2 answers

9

Transport Layer
Solution for Q1 ,Q2?

answered 15 hours ago in Computer Networks by foobar (11 points) | 464 views

0 votes

1 answer

10

GATEBOOK-2019-CN2-4
A computer on a 6-Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 1 Mbps. It is initially filled to capacity with 8 megabits. How long can the computer transmit at the full 6 Mbps? 1.6 sec 2.3 sec 3.4 sec 4.5 sec

answered 1 day ago in Computer Networks by Rishi yadav Loyal (7.1k points) | 26 views

+20 votes

7 answers

11

GATE2006-44
Station $A$ uses $32$ $\text{byte}$ packets to transmit messages to Station $B$ using a sliding window protocol. The round trip delay between A and $B$ is $80$ $\text{milliseconds}$ and the bottleneck bandwidth on the path between $A$ and $B$ is $128$ $\text{kbps}$ . What is the optimal window size that $A$ should use? $20$ $40$ $160$ $320$

answered 1 day ago in Computer Networks by goxul Active (4.2k points) | 7k views

0 votes

0 answers

12

Test series

asked 1 day ago in Computer Networks by abhishekmehta4u Boss (24k points) | 31 views

0 votes

0 answers

13

Rsa algorithm
Rsa algorithm is used by choosing two prime numbers say p=3 and q=11.If the public key is e=3 then what is the cipher value to transmit the character 'u'???

asked 1 day ago in Computer Networks by saumya mishra Active (1.4k points) | 17 views

0 votes

2 answers

14

IPv4 (Wrap around time)
Consider an IPv4 network. Each host can generate packets at the rate of 500 packets per second. If each host in the network is identified by unique identification number of 48 bits, then the host wrap around time for generating packets will be ________s

answered 2 days ago in Computer Networks by Things To Know (Thin Junior (985 points) | 62 views

0 votes

0 answers

15

classless subnetting forouzan ex
An organization is granted the block 130.56.0.0/16. The administrator wants to create 1024 subnets. Find the first and last addresses in subnet 3.

asked 2 days ago in Computer Networks by Meenakshi Sharma Active (3k points) | 29 views

0 votes

0 answers

16

#CN Error Detection - How many bit errors can simple parity bit error detection or 1-D parity bit can detect?

asked 2 days ago in Computer Networks by iarnav Loyal (9k points) | 7 views

0 votes

0 answers

17

#Self doubt
https://gateoverflow.in/193583/computer-network please explain how the answer is option c?

asked 2 days ago in Computer Networks by himgta Active (2.3k points) | 12 views

0 votes

0 answers

18

made easy test series
answer given is 11. I am Getting 3

asked 2 days ago in Computer Networks by amitqy Junior (757 points) | 12 views

+2 votes

4 answers

19

exponential backoff
Nodes A and B are connected with 100 Mbps ethernet segment with 6 microsec pop.delay between them.Suppose A,B send frames at t=0 and frames get collided.after first collision A draws k=0 and bdraws k=1.if jam signal is ignored and timeout is 1 RTT ... 's packet gets completely delivered to B...assume packet size 1000 bits. a)28 microsec b)16 microsec c)22 microsec d)38 microsec

answered 2 days ago in Computer Networks by akshayaK (255 points) | 793 views

0 votes

1 answer

20

A host with ip address 200.100.1.1 wants to send a packet to all hosts in the same network whats SIP and DIP

answered 2 days ago in Computer Networks by Things To Know (Thin Junior (985 points) | 27 views

0 votes

0 answers

21

CN MADE EASY

asked 3 days ago in Computer Networks by garimanand Active (1.2k points) | 25 views

0 votes

0 answers

22

class test
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? I. If the sequence number of a segment is m, then the sequencenumber of the subsequent segment is always m+1. ... than or equal to the advertised window. i am unable to understand this at all please help answer given is both 1 and 3

asked 3 days ago in Computer Networks by deepanshu sharma 3 (101 points) | 16 views

0 votes

1 answer

23

ME Test

answered 3 days ago in Computer Networks by YesAbhisa (71 points) | 25 views

0 votes

1 answer

24

Test Series

answered 3 days ago in Computer Networks by YesAbhisa (71 points) | 38 views

0 votes

1 answer

25

ME Test Series
[closed]

answered 3 days ago in Computer Networks by YesAbhisa (71 points) | 14 views

0 votes

0 answers

26

Zeal textbook

asked 4 days ago in Computer Networks by Harshit Pandey (23 points) | 16 views

0 votes

0 answers

27

ME Test series
[closed]

asked 4 days ago in Computer Networks by Shadan Karim (121 points) | 25 views

0 votes

1 answer

28

Sliding window protocol
Why can't I get answer by using formulae Window size = 1+2a..... Station A uses 32 byte packets to transmit messa ges to station B using sliding window protocol. The round trip delay between A and B is 40 milliseconds and the bottleneck bandwidth on the path between A and B is 64 kbps. The optimal window size of A is ______ 20 10 30 40

answered 4 days ago in Computer Networks by Shubham Aggarwal Active (1.2k points) | 65 views

0 votes

0 answers

29

Test Series

asked 4 days ago in Computer Networks by Shadan Karim (121 points) | 28 views

0 votes

0 answers

30

Test Series

asked 4 days ago in Computer Networks by Shadan Karim (121 points) | 39 views

0 votes

0 answers

31

ME Test Series

asked 4 days ago in Computer Networks by Shadan Karim (121 points) | 83 views

0 votes

0 answers

32

Application Layer
Is SMTP connection-oriented or connectionless ?

asked 5 days ago in Computer Networks by Subham Nagar Junior (681 points) | 17 views

+4 votes

2 answers

33

Ethernet
Consider two stations communicates via 1 Mbps satellite link with propagation delay of 270 msec. The satellite serves merely to retransmit data received from one station to another, with negligible switch delay. If Ethernet frame size is 1024 bits with 3 bits sequence number, then the maximum possible data throughput is ____________

answered 5 days ago in Computer Networks by kman30 (51 points) | 398 views

0 votes

0 answers

34

Short cut to calculate d (private key) ins RSA algorithm

asked 5 days ago in Computer Networks by Fida (67 points) | 26 views

0 votes

1 answer

35

Hamming distance error detection and correction

answered 6 days ago in Computer Networks by `JEET Active (1.3k points) | 32 views

0 votes

1 answer

36

CN-Doubt
Which classful subnet mask is useful for need of subnet a network that has 5 subnet each with at least 20 hosts. A.255.255.255.192 B.255.255.255.248 C.255.255.255.240 D.255.255.255.224

answered 6 days ago in Computer Networks by goxul Active (4.2k points) | 27 views

0 votes

1 answer

37

CN-DOUBT
A network that is 172.28.0.0 and would like to support 650 hosts per subnet.The subnet mask should we use is 255.255.____ and____?

answered 6 days ago in Computer Networks by goxul Active (4.2k points) | 20 views

0 votes

0 answers

38

CN-Doubt
In a network that has maximum packet size of 600 bytes a maximum packet lifetime of 30sec and a 8 bit packet sequence no.What is the max data rate in bps per connection?

asked 6 days ago in Computer Networks by Soumya Tiwari Active (1.3k points) | 116 views

0 votes

1 answer

39

GATEBOOK-2019-CN1-14
An upper-layer packet is split into $5$ frames, each of which has an $90$% chance of arriving undamaged. If no error control is done by the data link protocol, How many times must the message be sent on average to get the entire thing through? $2.1$ $1.9$ $1.7$ $2.4$

answered 6 days ago in Computer Networks by AMALJITH Junior (515 points) | 31 views

+1 vote

1 answer

40

GATEBOOK-2019-CN1-1
Which of the following CRC generators guarantee the detection of a single bit error ? P. Q. R. S. 1 P. $x^4$ + $x^2$ Q. $x^3$ +$x$+$1$ R. $x^2$+$1$ S. $1$ Only $P$ Only $P,Q$ Only $Q,R$ All of $P,Q,R,S$

answered 6 days ago in Computer Networks by Manoja Rajalakshmi A Active (4.5k points) | 37 views

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