Recent questions in Computer Networks

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1

IP addressing (ipv4)
What would be the broadcast address if a host in subnet 'a' wants to broadcast a packet in network 'X'? X is a network which is divided in various subnets namely 'a', 'b', ... 'z'.

asked 20 hours ago in Computer Networks by Vanshika_bhardwaj (61 points) | 21 views

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2

Corman

asked 1 day ago in Computer Networks by chandra (7 points) | 18 views

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1 answer

3

Computer Networks-Sliding Window
The round trip delay between X and Y is given as 60ms and the bottle nexk bandwidth of link between X and Y is 512 KBps. What is the optimal window size if the packet size is 64 bytes and the channel is full duplex. My answer is coming to be 481. is it correct?

asked 1 day ago in Computer Networks by Ayush Upadhyaya Boss (11.1k points) | 49 views

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4

forouzan
Which signal has a wider bandwidth, a sine wave with a frequency of 100 Hz or a sine wave with a frequency of 200 Hz?

asked 1 day ago in Computer Networks by arch Active (3.2k points) | 3 views

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3 answers

5

test series
DH key exchange algorithm is used to establish a session between sender and receiver with n=23 and g=5. The sender's secret key is 6 and the receiver's secret key is 15. What is the secret key between the receiver and sender? Please explain with solution P.S: Answer is given as 2

asked 2 days ago in Computer Networks by Kalpataru Bose (367 points) | 45 views

+2 votes

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6

Sliding window
Consider a sliding window protocol operating at the data link layer between two stations 1000 kilometers apart, directly connected by an error-free 1.0 Mbps link. The frame sizes used are 500 bits, of which 50 bits are header and 450 bits are data. Ack frames are 100 ... signal propagation delay is 10 µsec/km. If a window size of W = 10 is used, then the efficiency of the channel is

asked 3 days ago in Computer Networks by Jaggi (59 points) | 29 views

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7

Online
What will the congestion window size after 4 RTTs be provided the congestion window is assigned to 1 MSS(=512B) initially? My approach: First transmission: 1 MSS=512 B are sent, after first ack is received window size is 2MSS=1024 B, next after next two acks are received ... after the receival of 4 more acks window size is 8MSS=4096 B. Ans given is 2560 B . Please correct me if I am wrong.

asked 5 days ago in Computer Networks by Rohan Chatterjee (7 points) | 13 views

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8

Computer network
we know that router is a 3 layer device (upto network layer)....then how it runs RIP,OSPF protocol for routing protocol ????i mean routing protocol runs on transport layer(because they uses UDP/TCP).....how it is possible??

asked 6 days ago in Computer Networks by Ravi prakash pandey Junior (753 points) | 10 views

+1 vote

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9

ME_Test_CSMA/CD
I was not convinced by the solution provided so, I made my own analysis. Given propagation delay is 225-bit times, and since bandwidth is $10^7 bps$, so my $T_p=22.5 \mu s$ Suppose at t=0, both A and B start to transmit. At t=$22.5 \mu s$, both A and B will detect ... both A and B. Now, my question is whether at t=$51 \mu s$ my channel would look idle to A and B or at $50 \mu s$ ?

asked 6 days ago in Computer Networks by Ayush Upadhyaya Boss (11.1k points) | 22 views

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1 answer

10

Bit stuffing
A message M = 11111111 after bit stuffing with End delimeter as 111 will be sent as____________?

asked Aug 13 in Computer Networks by Lone Wolf Junior (875 points) | 69 views

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11

frozen chapter 19 Ex. 19.10
An ISP is granted a block of addresses starting with 190.100.0.0/16 (65,536 addresses). The ISP needs to distribute these addresses to three groups of customers as follows: a. The first group has 64 customers; each needs 256 addresses. b. The ... the ISP: 40,960 Number of available addresses: 24,576 In this question I am not able to understand how they divide the groups [closed]

asked Aug 13 in Computer Networks by Nilabja Sarkar (73 points) | 13 views

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1 answer

12

Ethernet
In Ethernet the header size is 26 Bytes. Can anybody explain me how it is?

asked Aug 12 in Computer Networks by R Prabhakar 1 (39 points) | 22 views

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2 answers

13

ip addressing
A host in a subnet has the IP address 130.83.126.10. How many hosts can be addressed in network? Here subnet mask is not given . please explain brieflly.

asked Aug 12 in Computer Networks by Siddharth Bhardawaj Junior (921 points) | 35 views

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0 answers

14

ip addressing
The subnet mask for a particular network is 255.255.31.0 . Which of the following pairs of IP addresses could belong to this network? a) 172.57.88.62 and 172.57.87.23 b) 10.35.28.2 and 10.35.29.4 c) 191.203.31.87 and 191.234.31.88 d) 128.8.129.43 and 128.8.161.55 Explain briefly with valid points.

asked Aug 12 in Computer Networks by Siddharth Bhardawaj Junior (921 points) | 16 views

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15

GATE syllabus
Does TDM, pooling, Token Ring access control method in GATE 2019 Syllabus?

asked Aug 12 in Computer Networks by abdulmcajh (7 points) | 13 views

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1 answer

16

Doubt in networking
Except reliability and connection oriented what are the other functionalities which are produced by TCP but not by UDP?

asked Aug 10 in Computer Networks by soumayan bandhu (429 points) | 18 views

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1 answer

17

Doubt in networking
What is the difference between host to host network connection and end to end network connection? Why host to host connection for network layer and end to end connection for transport layer?

asked Aug 10 in Computer Networks by soumayan bandhu (429 points) | 22 views

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0 answers

18

Doubt in networking
I have a small doubt about throughput concept in TDM. Can you explain how Throughput of LAN = number of stations in LAN * Throughput of each station. (Throughput is in bits per second )

asked Aug 10 in Computer Networks by soumayan bandhu (429 points) | 6 views

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1 answer

19

Made easy testseries
Application layer entity wants to send 500 byte message to its peer process , using an existing TCP connection . The TCP segment consists of the message plus 20 bytes of header . The segment is encapsulated into an IP packet that has an additional 20 ... bytes of Header and Trailer . The percentage of the transmitted bits in physical layer is correspond to message is ??????

asked Aug 9 in Computer Networks by Lokesh Arya (111 points) | 9 views

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1 answer

20

Ethernet
For gigabit ethernet , the length of the cable , if length of the cable in standard ethernet L(2000) to maintain same frame size is???

asked Aug 9 in Computer Networks by Lokesh Arya (111 points) | 17 views

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1 answer

21

TCP CONGESTION CONTROL
Let the size of congestion window of a TCP connection be 32KB , when the time out occurs , maximum segment size used is 2KB , if the time taken by TCP connection to get 32KB congestion window is 440 msec then the RTT of connection is ???

asked Aug 9 in Computer Networks by Lokesh Arya (111 points) | 7 views

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1 answer

22

Made Easy Workbook - Computer Networks
Consider two machines, A and B, connected by a 100 Mbps Ethernet with three store and forward relay switches in path between them. Suppose that no other machines are using the Ethernet, that each link introduces a propagation delay 12 microsecond, and ... for a 1500 bytes packet, as measured from transmission of first bit from A to receipt of last bit at B?

asked Aug 8 in Computer Networks by Sumit Singh Chauhan Junior (943 points) | 15 views

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1 answer

23

Made Easy Workbook - Computer Network
The round trip propagation delay for a 100Mbps Ethernet having 48-bit jamming signal is 64 ms. What is the minimum frame size (in bytes)?

asked Aug 7 in Computer Networks by Sumit Singh Chauhan Junior (943 points) | 32 views

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1 answer

24

flow control protocol
for stop and wait ARP,for n data packets sent ___acknowledgements needed.

asked Aug 7 in Computer Networks by AMAN VERMA 4 (17 points) | 15 views

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1 answer

25

Made Easy Workbook - Computer Networks
If two stations A and B uses copper twisted pair cable having capacity 200 bits/sec. if A transmitted 20 frames to B each of size 50 bits, Assume RTT is neglected. What is the time (in Sec) required to transmit the single frame from A to B if pipelining has been used?

asked Aug 6 in Computer Networks by Sumit Singh Chauhan Junior (943 points) | 25 views

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1 answer

26

Made Easy Workbook - Computer Network
In a Hub based lan system collision is detected by a) Hub b) Transmitting node c) Hub and Transmitting Node d) Recieving Node

asked Aug 6 in Computer Networks by Sumit Singh Chauhan Junior (943 points) | 14 views

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27

Made Easy Workbook
What signal-to-noise ratio is needed to put a T1 carrier on a 50-kHz line?

asked Aug 6 in Computer Networks by Sumit Singh Chauhan Junior (943 points) | 14 views

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28

Cryptography Topics in Syllabus
Are the following topics there in Syllabus? Digital Signatures Elgamal Digital Signature Scheme Schnorr Digital Signature Scheme Message Authentication Codes Data Encryption Standard (DES) Advanced Encryption Standard (AES) Triple DES Elliptic Curve Cryptography Secure Hash Algorithm (SHA) Message Authentication Codes(MAC)

asked Aug 5 in Computer Networks by Balaji Jegan Active (1.4k points) | 7 views

+1 vote

0 answers

29

RPSC Programmer Exam 2013
A local area network operates Ethernet with CSMA/CD mechanism and runs at a transmission rate of 8 Mbps and a one-way signal propagation time of 25 microseconds. How long has a station to wait before trying to access the channel again, after experiencing 5 successive collisions? 1. 125 microseconds. 2. 625 microseconds 3. 800 microseconds 4. 1600 microseconds.

asked Aug 5 in Computer Networks by irfan119 (17 points) | 13 views

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30

Concept of layering
Sir i have a doubt in data link layer. I read somewhere DLL takes packet from Network Layer and split into frame. And i also read DLL takes raw bit stream from physical layer?.. Please explain with example how data flow in networking starting from source.

asked Aug 5 in Computer Networks by Abhishek Kumar 38 (7 points) | 17 views

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