Recent questions tagged computer-networks

+1 vote

3 answers

1

ISRO2020-54
Checksum field in TCP header is ones complement of sum of header and data in bytes ones complement of sum of header, data and pseudo header in $16$ bit words dropped from IPv$6$ header format better than md$5$ or sh$1$ methods

asked Jan 13 in Computer Networks by Satbir Boss (23.8k points) | 185 views

+2 votes

2 answers

2

ISRO2020-58
Remote Procedure Calls are used for communication between two processes remotely different from each other on the same system communication between two processes on the same system communication between two processes on the separate systems none of the above

asked Jan 13 in Computer Networks by Satbir Boss (23.8k points) | 161 views

+2 votes

1 answer

3

ISRO2020-45
Avalanche effect in cryptography refers Large change in cipher text when the keyword is changed minimally Large changes in cipher text when the plain text is changed Large Impact of keyword change to length of the cipher text None of the above

asked Jan 13 in Computer Networks by Satbir Boss (23.8k points) | 120 views

+1 vote

2 answers

4

ISRO2020-44
In a columnar transportation cipher, the plain text is “the tomato is a plant in the night shade family”, keyword is “$TOMATO$”. The cipher text is $”TINESAX/EOAHTFX/HTLTHEY/MAIIAIX/TAPNGDL/OSTNHMX”$ $”TINESAX/EOAHTFX/MAIIAIX/HTLTHEY/TAPNGDL/OSTNHMX”$ $”TINESAX/EOAHTFX/HTLTHEY/MAIIAIX/OSTNHMX/TAPNGDL”$ $”EOAHTFX/TINESAX/HTLTHEY/MAIIAIX/TAPNGDL/OSTNHMX”$

asked Jan 13 in Computer Networks by Satbir Boss (23.8k points) | 109 views

+2 votes

2 answers

5

ISRO2020-53
The persist timer is used in TCP to To detect crashes from the other end of the connection To enable retransmission To avoid deadlock condition To timeout FIN_WAIT$1$ condition

asked Jan 13 in Computer Networks by Satbir Boss (23.8k points) | 128 views

+3 votes

1 answer

6

Data communication and networking by forouzan 12.7 Exercise Qn 16
16. In a CDMA/CD network with a data rate of 10 Mbps, the maximum distance between any station pair is found to be 2500 m for the correct operation of the collision detection process. What should be the maximum distance if we increase the data rate to 100 Mbps? To 1 Gbps? To 10 Gbps?

asked Nov 7, 2019 in Computer Networks by Mk Utkarsh Boss (36.4k points) | 145 views

0 votes

1 answer

7

Data communication and networking by forouzan 12.7 Exercise Qn 15
15. In a CDMA/CD network with a data rate of 10 Mbps, the minimum frame size is found to be 512 bits for the correct operation of the collision detection process. What should be the minimum frame size if we increase the data rate to 100 Mbps? To 1 Gbps? To 10 Gbps?

asked Nov 7, 2019 in Computer Networks by Mk Utkarsh Boss (36.4k points) | 66 views

0 votes

0 answers

8

Data communication and networking by forouzan 12.7 Exercise
11. We have a pure ALOHA network with 100 stations. If $T_{fr} = 1 \mu s$, what is the number of frames each station can send to achieve the maximum efficiency. 12. Repeat Exercise 11 for slotted ALOHA.

asked Nov 7, 2019 in Computer Networks by Mk Utkarsh Boss (36.4k points) | 75 views

+1 vote

1 answer

9

forouzan 5 th edition
A host has the address 581E: 1456:2314:ABCD::1211. If the node identification is 48 bits, find the address of the subnet to which the host is attached.

asked Jun 10, 2019 in Computer Networks by chirudeepnamini Active (4.3k points) | 156 views

0 votes

1 answer

10

forouzan 4th edition chapter 19
An organization is granted the block 16.0.0.0/8. The administrator wants to create 500 fixed-length subnets.Find the first and last addresses in subnet 500.

asked Jun 10, 2019 in Computer Networks by chirudeepnamini Active (4.3k points) | 156 views

0 votes

1 answer

11

self doubt Stop and wait protocol
Consider a network topology using STOP and WAIT protocol A---------R----------B (here R is STORE and FORWARD ROUTER) Tp=1uS , Tx(data)=1000uS, Tx(ack)=10uS File Size =10000bits, Packet size=1000bits. How long will it take for A to ... then A will Transmit second packet OR here A will send packet toHost B and B will send ack back to A then A will send second packet

asked Jun 9, 2019 in Computer Networks by gourav94240 (135 points) | 115 views

0 votes

1 answer

12

Self Doubt:TDM and Polling
Is Time division multiplexing and Polling in syllabus? In the official website they have mentioned only ethernet..

asked May 30, 2019 in Computer Networks by Hirak Active (3.6k points) | 96 views

0 votes

1 answer

13

GeeksForGeeks IP addressing ...
Which of the following is a public IP? 10.15.14.12 192.168.52.62 173.32.1.1 None

asked May 30, 2019 in Computer Networks by Hirak Active (3.6k points) | 174 views

0 votes

0 answers

14

Computer Networks -email
How will you send an e-mail to someone when you have neither the recipient's e-mail address nor the e-mail application.

asked May 22, 2019 in Computer Networks by shraddha priya Active (4k points) | 88 views

+1 vote

0 answers

15

Made Easy Test Series: Computer Network-Dijkstra Algo
Consider Dijkstra's algorithm in linked state routing protocol at node $u.$ Professor Ram first sets the route for each directly connected node $v.$ to be the link connecting $u$ to $v.$ Ram then implements the rest of the algorithm ... costs where all routing table entry will be correct. $D)$ Both $A)$ and $B)$ How Dijkstra working here?

asked May 14, 2019 in Computer Networks by srestha Veteran (118k points) | 106 views

+1 vote

0 answers

16

ISI2018-PCB-CS9
The data link layer uses a fixed-size sliding window protocol, where the window size for the connection is equal to twice the bandwidth-delay product of the network path. Consider the following three scenarios, in each of which only the given parameter changes as specified (no ... minimum value of the round trip time $R$ increases to $1.8R$; the window size $W$ decreases to $W/3$

asked May 12, 2019 in Computer Networks by akash.dinkar12 Boss (42.4k points) | 70 views

+1 vote

1 answer

17

Self Doubt :Bit Stuffing
End delimeter is → 0111 data to be sent 0111111111. What is the data we should send to the reciever?

asked May 8, 2019 in Computer Networks by Hirak Active (3.6k points) | 186 views

0 votes

0 answers

18

Made Easy Test Series: Computer Network-ICMP
Consider a very large network $10000$ routers. Two host $A$ and $B$ connected with this network. Host $A$ sends a data to host $B$. and after some unit of time host $A$ receives $ICMP$ time exceed message for the samedata ... some ICMP message generated? Say if $ICMP$ message generated in $9999th$ router, then where it give error of time exceed message?

asked Apr 20, 2019 in Computer Networks by srestha Veteran (118k points) | 181 views

0 votes

1 answer

19

Kurose and Ross Edition 6 Exercise 3 Question R18 (Page No 288)
True or false? Consider congestion control in TCP. When the timer expires at the sender, the value of ssthresh is set to one half of its previous value.

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 163 views

0 votes

2 answers

20

Kurose and Ross Edition 6 Exercise 3 Question R17 (Page No 287)
Suppose two TCP connections are present over some bottleneck link of rate R bps. Both connections have a huge file to send (in the same direction over the bottleneck link). The transmissions of the files start at the same time. What transmission rate would TCP like to give to each of the connections?

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 95 views

0 votes

1 answer

21

Kurose and Ross Edition 6 Exercise 3 Question R15 (Page No 287)
Suppose Host A sends two TCP segments back to back to Host B over a TCP connection. The first segment has sequence number 90; the second has sequence number 110. How much data is in the first segment? Suppose that the ... segment arrives at B. In the acknowledgment that Host B sends to Host A, what will be the acknowledgment number?

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 198 views

0 votes

1 answer

22

Kurose and Ross Edition 6 Exercise 3 Question R14 (Page No 287)
True or false? Host A is sending Host B a large file over a TCP connection. Assume Host B has no data to send Host A. Host B will not send acknowledgments to Host A because Host B cannot piggyback the acknowledgments ... 4 bytes of data over a TCP connection to Host B. In this same segment the acknowledgment number is necessarily 42.

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 97 views

0 votes

0 answers

23

Kurose and Ross Edition 6 Exercise 3 Question R13 (Page No 287)
Visit the Selective Repeat Java applet at the companion Web site. Have the source send five packets, and then pause the animation before any of the five packets reach the destination. Then kill the first packet and resume ... what happens. Finally, try sending six packets. What happens? How selective repeat and go back-n is different?

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 24 views

0 votes

1 answer

24

Kurose and Ross Edition 6 Exercise 3 Question R12 (Page No 286)
Visit the Go-Back-N Java applet at the companion Web site. Have the source send five packets, and then pause the animation before any of the five packets reach the destination. Then kill the first packet and ... destination and kill the first acknowledgment. Describe again what happens. Finally, try sending six packets. What happens?

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 41 views

0 votes

0 answers

25

Kurose and Ross Edition 6 Exercise 3 Question R11 (Page No 286)
Suppose that the roundtrip delay between the sender and receiver is constant and known to the sender. Would a timer still be necessary for protocol rdt 3.0 as shown in the figure, assuming that packets can be lost? Explain.

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 39 views

0 votes

1 answer

26

Kurose and Ross Edition 6 Exercise 3 Question R10 (Page No 286)
In our rdt protocols, why did we need to introduce timers?

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 64 views

0 votes

1 answer

27

Kurose and Ross Edition 6 Exercise 3 Question R9 (Page No 286)
In our rdt protocols, why did we need to introduce sequence numbers?

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 33 views

0 votes

1 answer

28

Kurose and Ross Edition 6 Exercise 3 Question R8 (Page No 286)
Suppose that a Web server runs in Host C on port 80. Suppose this Web server uses persistent connections and is currently receiving requests from two different Hosts, A and B. Are all of the requests being sent through the ... If they are being passed through different sockets, do both of the sockets have port 80? Discuss and explain.

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 34 views

0 votes

1 answer

29

Kurose and Ross Edition 6 Exercise 3 Question R6 (Page No 286)
Is it possible for an application to enjoy reliable data transfer even when the application runs over UDP? If so, how?

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 31 views

0 votes

2 answers

30

Kurose and Ross Edition 6 Exercise 3 Question R5 (Page No 286)
Why is it that voice and video traffic is often sent over TCP rather than UDP in today’s Internet? (Hint: The answer we are looking for has nothing to do with TCP’s congestion-control mechanism.)

asked Apr 18, 2019 in Computer Networks by ajaysoni1924 Boss (10.8k points) | 23 views

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