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Recent questions tagged flow-control-methods

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[email protected] 2023 Test Series
Answer a,b,c,d

Amit Mehta asked in Computer Networks Oct 20, 2022

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Test series question(Aceacademy)
Can someone explain it to me as to why in selective repeat it's not possible for an acknowledgment to come for a packet that falls outside the current window? Because it may be possible that there is some delayed acknowledgment. It's possible ... I feel is not possible because here we are talking about cumulative ack not independent. So how is this reason valid?

Ananya Nayak asked in Computer Networks Dec 25, 2021

by Ananya Nayak

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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 34 (Page No. 254)
Consider an error-free 64-kbps satellite channel used to send 512-byte data frames in one direction, with very short acknowledgements coming back the other way. What is the maximum throughput for window sizes of 1, 7, 15, and 127? The earth-satellite propagation time is 270 msec.

ajaysoni1924 asked in Computer Networks Mar 16, 2019

by ajaysoni1924

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Andrew S. Tanenbaum Edition 5th Exercise 3 Question 22 (Page No. 253)
A 3000-km-long T1 trunk is used to transmit 64-byte frames using Protocol GO back N. If the propagation speed is 6 μsec/km, how many bits should the sequence numbers be?(refer Tanenbaum)

ajaysoni1924 asked in Computer Networks Mar 16, 2019

by ajaysoni1924

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5

Gateforum mock 2

Prince Sindhiya asked in Computer Networks Jan 20, 2019

by Prince Sindhiya

240 views

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1 answer

6

cbt-1
A Selective Repeat ARQ is using 7 bits to represent the sequence numbers.The maximum window size is __________. (ans is 64) why It is

mrinmoyh asked in Computer Networks Jan 17, 2019

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ME_test_series
Assume in TCP client is sending segment to server. After successfully receiving segments from client, server is waiting for next segments and clients is also waiting for acknowledgment from the server and this lead to deadlock situation. Which timer is used and who ... timer, client Keep alive timer, client I am not understand how persistent timer is used and what is it used for?

Shivam Kasat asked in Computer Networks Jan 13, 2019

by Shivam Kasat

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MadeEasy Subject Test 2019: Computer Networks - Flow Control Methods
Here in LIST—II,i think point 1,2 is true for all the protocols. please confirm!

junaid ahmad asked in Computer Networks Dec 22, 2018

by junaid ahmad

280 views

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1 answer

9

MadeEasy Subject Test 2019: Computer Networks - Flow Control Methods
Some one please explain the concept behind this.

Markzuck asked in Computer Networks Dec 21, 2018

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MadeEasy Subject Test 2019: Computer Networks - Flow Control Methods
for Transmission delay, 2KB, K shall be 1024 and NOT 1000 as its data, right?

Markzuck asked in Computer Networks Dec 17, 2018

298 views

3 votes

2 answers

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MadeEasy Test Series: Computer Networks - Flow Control Methods
Assume 2 computers are connected via a network. The network uses Go-Back 7 sliding window protocol for maintaining flow control. It is observed that every 5th packet that has been sent through the network is lost. ... number of extra packets that has to be resent for transmitting 10 such packet through the network? With explanation.

Subham Nagar asked in Computer Networks Dec 17, 2018

by Subham Nagar

1.9k views

2 votes

1 answer

12

MadeEasy Subject Test 2019: Computer Networks - Flow Control Methods
consider a network connecting two nodes A and B having a propagation delay of 6*10^-4 micro sec.bandwidth of network is 150 Mbps if each frame size is 5000 bytes and both uses go back n sliding window protocal, where maximum 100 frames can be sent at a time then the maximum possible data rate is ----- [ mbps]

suneetha asked in Computer Networks Dec 9, 2018

1.2k views

1 vote

1 answer

13

TCP-Flow Control
Suppose host A is sending a large file to host B over a TCP connection. The two end hosts are 10msec apart (20msec RTT) connected by a 1Gbps link. Assume that they are using a packet size of 1000 bytes to transmit the file. Also assume for simplicity that ACK ... $W_s \gt 2000.8$(Window Size) And hence my answer came 2001. Is it correct?

Ayush Upadhyaya asked in Computer Networks Nov 10, 2018

by Ayush Upadhyaya

451 views

2 votes

0 answers

14

MIT assignment
A geosynchronous satellite has a half-duplex channel with a transmission rate of 10 kbps and a propagation delay of 0.25 sec each way. With a data packet size of 1000 bits and a loss probability p of 0.001 ,(A) what is the expected transmission time of ... parameters are the same as part (a), what is the longest channel propagation delay for which we can still use stop-and-wait?

sushmita asked in Computer Networks Oct 15, 2018

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flow control
A series of 1000 bit frames is to be transmitted across a data link 100 km in length at 20 Mbps. If the link has a velocity of propagation 2*10^8 m/s and BER is 2*10 ^-5, then the link utlization for i. selective repeat with send window w=10 ii. go back n with send window w =10 is a) 34%,46% b)46%,20% c)46%,34% d)20%,46%

balaganesh asked in Computer Networks Oct 6, 2018

771 views

1 vote

1 answer

16

flow control
Host A is sending data to host B over a full duplex link. A and B are using the sliding window protocol for flow control. The send and receive window sizes are 4 packets each. Data packets (sent only from A to B) are all 1500 bytes long and the transmission time ... What is the maximum achievable throughput in this communication? 3.75 10^6 Bps 7.5 10^6 Bps 10 10^6 Bps 12.75 10^6Bps

balaganesh asked in Computer Networks Oct 5, 2018

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1 answer

17

Flow control methods

Sambhrant Maurya asked in Computer Networks Sep 17, 2018

by Sambhrant Maurya

351 views

1 vote

3 answers

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Ace Test Series: Computer Networks - Flow Control Methods

thor asked in Computer Networks Dec 7, 2016

by thor

262 views

2 votes

1 answer

19

MadeEasy Test Series: Computer Networks - Flow Control Methods
Assume 100 nodes are connected to a 10000 meter length of coaxial cable. Using some protocol, each node can transmit 100 frames/seconds, where the average frame length is 2500 bits. The transmission rate of the system is 108 bps. The efficiency of the protocol in percentage is _______. Answer given :: 25

thor asked in Computer Networks Dec 5, 2016

by thor

1.5k views

4 votes

1 answer

20

TestBook Test Series: Computer Networks - Flow Control Methods
Two station A and B are connected via a point to point Link.A sends a freame to B using Go back-n protocolwith window size 7 and sequence number is of 3 bit.A sends frame one by one but B's ack for frame 3 is not reached to ... ACK4,but frame 5 is lost and not received by B..so now what will be the buffer frame of current window of A?

Aboveallplayer asked in Computer Networks Nov 5, 2016

by Aboveallplayer

521 views

2 votes

9 answers

21

MadeEasy Test Series: Computer Networks - Flow Control Methods
Station X needs to send a message consisting of 12 packets to station Y using a sliding window protocol (Window Size 4) and Go back n error control strategy. All packets are ready and immediately available for transmission. If every ... gets lost), then the number of packets that X will transmit for sending the message to Y are _____.

nvnverma18 asked in Computer Networks Sep 23, 2016

1.0k views

2 votes

3 answers

22

MadeEasy Test Series 2017: Computer Networks - Flow Control Methods
Consider a network connecting two systems located 4000 kilometers apart. The bandwidth of the network is 64 Mbps. The propagation speed of the media is 2/3 of the speed of light in vacuum. It is needed to design selective ... at nodes are negligible. Then, the minimum size in bits of the sequence number field has to be _________.

Pankaj Joshi asked in Computer Networks Sep 8, 2016

by Pankaj Joshi

1.6k views

3 votes

1 answer

23

MadeEasy Test Series: Computer Networks - Flow Control Methods
consider a link of length 1000 km with 10^9 bps rate connecting a sender and receiver. assume a fixed packet length of 1250 bytes and sender always has packet to send. packet are never lost or corrupted in the connection. what is the ... window protocol? assume signal propagation is 5 microsec per km (A) 100 (B) 1000 (C) 110 (D) 1100

cse7 asked in Computer Networks Aug 25, 2016

by cse7

990 views

1 vote

0 answers

24

MadeEasy Workbook: Computer Networks - Flow Control Methods
If the size of window is N and N # of frames are transmitted and it is supporting cumulative ACK. The Ack no. that is transmitted is ACK p.Then Calculate a)how many frames are received to the receiver b) How many frames are ... it using GOBACKN and my answer is not matching to his answer plus approach is diff. Anybody ??? help me on this.

mohit chawla asked in Computer Networks Jul 25, 2016

by mohit chawla

580 views

2 votes

1 answer

25

MadeEasy Test Series: Computer Networks - Flow Control Methods
Bandwidth of a link is 1000 Mbps and round trip time is given as 250 μ sec. If frame size is 500 bits, the utilization (in percentage) of channel when STOP and WAIT ARQ is used is _______.

Akanksha Kesarwani asked in Computer Networks Feb 1, 2016

by Akanksha Kesarwani

1.0k views

1 vote

2 answers

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MadeEasy Test Series: Computer Networks - Flow Control Methods
Please help me to solve problem 8.

shikharV asked in Computer Networks Nov 21, 2015

1.2k views

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