Recent questions tagged congestion-control / GATE Overflow for GATE CSE

2 votes

0 answers

31

MadeEasy Subject Test 2019: Computer Networks - Congestion Control
Consider an instance of TCP additive increase multiplicative decrease (AIMD) algorithm where the window size at the start of the slow start phase is 2 MSS and the threshold at the start of the first transmission is 12 ... question is, After reached to threshold, should we have to increase congestion window with 1MSS or with 2MSS.

Consider an instance of TCP additive increase multiplicative decrease (AIMD) algorithm where the window size at the start of the slow start phase is 2 MSS and the thres...

JAYKISHAN

1.0k views

JAYKISHAN asked Jan 14, 2019

2 votes

1 answer

32

MadeEasy Test Series 2019: Computer Networks - Congestion Control
here TOTAL 2000 segments need to be sent, and after x RTT, it will send 2001 segments but for total we shall take count of addition of all the previous also na?

here TOTAL 2000 segments need to be sent, and after x RTT, it will send 2001 segments but for total we shall take count of addition of all the previous also na?

Markzuck

942 views

Markzuck asked Jan 10, 2019

2 votes

2 answers

33

MadeEasy Test Series 2019: Computer Networls - Congestion Control
Please help, I am getting total number of transmission to get BACK TO 38 as 14 and NOT 15. after 14th, it would have became 38, so no need to consider 15th segment right?

Please help, I am getting total number of transmission to get BACK TO 38 as 14 and NOT 15.after 14th, it would have became 38, so no need to consider 15th segment right?

Markzuck

1.0k views

Markzuck asked Jan 7, 2019

2 votes

1 answer

34

Computer network tcp congestion control

mitesh kumar

766 views

mitesh kumar asked Jan 7, 2019

1 votes

0 answers

35

me test
Consider an instance of TCP's Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 MSS and the threshold at the start of 1 st transmission is 16 MSS. Assume TCP use over a lossy link i.e., timeout ... window at the start of slow start phase is 2 MSS ;so when timeout occur should'nt we start with window size of 2 MSS]

Consider an instance of TCP's Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 MSS and the threshold...

newdreamz a1-z0

492 views

newdreamz a1-z0 asked Jan 7, 2019

2 votes

2 answers

36

fast retransmit and fast recovery mechanism
Consider the following plot of TCP window size as a function of time. Assume TCP is operating with slow start, congestion avoidance, fast retransmit and fast recovery mechanism. What is the time interval where the slow start ... value of threshold. It starts congestion avoidance phase again. Please explain in more details about the concept underlying?

Consider the following plot of TCP window size as a function of time. Assume TCP is operating with slow start, congestion avoidance, fast retransmit and fast recovery mec...

Sandy Sharma

2.0k views

Sandy Sharma asked Jan 6, 2019

1 votes

0 answers

37

MadeEasy Test Series: Computer Networks - Congestion Control
I am getting answer as 9, someone please post their solution stepwise, that would be of great help to identify the mistake.

I am getting answer as 9, someone please post their solution stepwise, that would be of great help to identify the mistake.

Markzuck

803 views

Markzuck asked Dec 26, 2018

1 votes

0 answers

38

MadeEasy Subject Test 2019: Computer Networks - Congestion Control
shouldn’t the ans be 5600? as it takes 14 RTTs to get back to full size ans given is considered 15 RTTs please confirm

shouldn’t the ans be 5600? as it takes 14 RTTs to get back to full sizeans given is considered 15 RTTs please confirm

Markzuck

459 views

Markzuck asked Dec 17, 2018

2 votes

2 answers

39

TCP Congestion window
Assume the scenario where size of the congestion window of a TCP connection be 40KB when timeout occurs. The MSS is 2KB. Propagation delay be 200msec. Time taken by TCP connection to get back to 40KB congestion window is …...

Assume the scenario where size of the congestion window of a TCP connection be 40KB when timeout occurs. The MSS is 2KB. Propagation delay be 200msec. Time taken by TCP c...

Na462

1.2k views

Na462 asked Dec 2, 2018

2 votes

1 answer

40

MadeEasy Subject Test 2019: Computer Networks - Congestion Control
Consider an instance of TCP's Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 1 MSS and the threshold at the start is 1st transmission is 16 MSS. Assume TCP use ... after transmission of 7th packet . What is the congestion window size at the end of 14 RTT (in MSS)?

Consider an instance of TCP’s Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 1 MSS and the thresho...

Sandy Sharma

976 views

Sandy Sharma asked Dec 1, 2018

1 votes

1 answer

41

TCP congestion control
Suppose you are using TCP to transfer a 4 MB file over a network. The receiver advertises a receive window of 4 MB. Assume that the retransmission timers expire after 5 RTTs. (a) If TCP sends 4KB segments, how many RTTs does it take ... implements fast retransmit and fast recovery. How many RTTs are saved by the fact that your TCP implements fast retransmit and fast recovery?

Suppose you are using TCP to transfer a 4 MB file over a network. The receiver advertises a receive window of 4 MB. Assume that the retransmission timers expire after 5 R...

akmishra_1947

812 views

akmishra_1947 asked Nov 26, 2018

1 votes

0 answers

42

MadeEasy Subject Test 2019: Computer Networks - Congestion Control
Consider an instance of TCP's Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 MSS and the threshold at the start is 1st transmission is 12 MSS. ... of 7th transmission . The congestion window size at the end of 12th transmission is _________ (in MSS).

Consider an instance of TCP’s Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 MSS and the thresho...

jatin khachane 1

552 views

jatin khachane 1 asked Nov 26, 2018

3 votes

1 answer

43

Congestion control
Consider the effect of using slow start on a line with 10 msec round trip time. The receiver window and the size of congestion window are set to 38 KB and 36 KB respectively. Sender side threshold is set to 18 KB. After 8 transmission a timeout occurs, after time out, the time taken to send first full window of 18 KB is ________ (in msec).

Consider the effect of using slow start on a line with 10 msec round trip time. Thereceiver window and the size of congestion window are set to 38 KB and 36 KBrespectivel...

Shivangi Parashar 2

2.2k views

Shivangi Parashar 2 asked Oct 16, 2018

0 votes

1 answer

44

Tcp AIMD
Consider "Additive -increase multiplicative -decrease "approach of TCP congestion control.one MSS(Maximum Segment Size)is 512B .If the TCP sender doesn't perceive the path as not congested then. What will be the congestion window size after 4RTTS provided the congestion window is assigned 1MSS initially ?

Consider "Additive -increase multiplicative -decrease "approach of TCP congestion control.one MSS(Maximum Segment Size)is 512B .If the TCP sender doesn't perceive the pa...

Shivangi Parashar 2

3.8k views

Shivangi Parashar 2 asked Oct 12, 2018

0 votes

1 answer

45

Tcp AIMD

Shivangi Parashar 2

702 views

Shivangi Parashar 2 asked Oct 11, 2018

0 votes

1 answer

46

MadeEasy Test Series: Computer Networks - Congestion Control
Consider an instance of TCP's Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 1 MSS and the threshold at the start is 1st transmission is 16 MSS. Assume TCP use over a lossy link i.e. ... is the congestion window size at the end of 14 RTT (in MSS)? A) 9 B) 11 C) 12 D) 14

Consider an instance of TCP’s Additive Increase Multiplicative Decrease (AIMD)algorithm where the window size at the start of slow start phase is 1 MSS and thethreshold...

abhishek1995_cse

835 views

abhishek1995_cse asked Sep 29, 2018

0 votes

1 answer

47

Additive increase Multiplicative Decrease
Consider instance of TCP AIMD protocol where the Window size at start is cwnd = 2, and the threshold is ssthresh = 16. Timeout occurs during the transmission of 7th packet. What is the value of cwnd at the end of 14RTT ?

Consider instance of TCP AIMD protocol where the Window size at start is cwnd = 2, and the threshold is ssthresh = 16. Timeout occurs during the transmission of 7th packe...

Na462

1.1k views

Na462 asked Sep 20, 2018

3 votes

3 answers

48

Leaky bucket algorithm

Na462

2.2k views

Na462 asked Sep 15, 2018

3 votes

1 answer

49

CN_METest
I have a doubt here. When timeout occurs, the congestion windows size is 18MSS.and Till now total RTT before this timeout were 6. Now, my threshold will be set to 9MSS and congestion window will start from 1 MSS.So, now when I send 1MSS window and receive it's ack and then my window size changes to 2MSS, will this RTT be counted as 7th RTT or the 8th RTT?

I have a doubt here. When timeout occurs, the congestion windows size is 18MSS.and Till now total RTT before this timeout were 6.Now, my threshold will be set to 9MSS and...

Ayush Upadhyaya

1.1k views

Ayush Upadhyaya asked Aug 22, 2018

0 votes

0 answers

50

I'm getting trouble to solve this Computer Network Numerical #Congestion #Packetization
Quoted Question: "Suppose you have a network with an RTT of 100ms and a packetization delay of 1ms for a maximum sized TCP segment of 1.4kB. You are using TCP Tahoe. The initial congestion window is 2 ... ; is the time before the first data byte is sent. Do not consider teardown." Thanks in advance.

Quoted Question:"Suppose you have a network with an RTT of 100ms and a packetization delay of 1ms for a maximum sized TCP segment of 1.4kB. You are using TCP Tahoe. The i...

Phantom5

718 views

Phantom5 asked Aug 21, 2018

0 votes

1 answer

51

doubt-testbook-test-series-CN-congestion-control
consider the effect of using slow start on a line with propagation delay of 10 ms.The receiver window is 24 kB and the maximum segment size is 2 KB .how long does it take to send full window size segment in ms with initial threshold of 20 KB?? my ... =7 RTT=2*10 ms=20 ms total time=7*20=140 ms answer is given 120 ms .correct me if i done any mistake

consider the effect of using slow start on a line with propagation delay of 10 ms.The receiver window is 24 kB and the maximum segment size is 2 KB .how long does it take...

Prateek Raghuvanshi

483 views

Prateek Raghuvanshi asked Jul 29, 2018

1 votes

1 answer

52

What is the difference between end to end congestion control and network- assisted congestion control ?

Isn't the flow control mechanism helping to prevent congestion in the network ?I am not getting how there is congestion at process end , if we say that buffer size is ful...

radha gogia

2.3k views

radha gogia asked May 24, 2018

1 votes

0 answers

53

TCP question
Consider two TCP senders $T_{1}$, $T_{2}$ each of them is connected with a different line to a router whose capacity is $9000$ $bytes$. The bandwidth of each of these lines is infinite and the delay of each TCP sender to the router is $11$ ... I thought is 2000kbps / 21Mbps + 11msec =.. After the other tcp sender starts to send data the shared common line will be 21Mbps/2

Consider two TCP senders $T_{1}$, $T_{2}$ each of them is connected with a different line to a router whose capacity is $9000$ $bytes$. The bandwidth of each of these lin...

JakeSmT

807 views

JakeSmT asked Mar 12, 2018

57 votes

5 answers

54

GATE CSE 2018 | Question: 55
Consider a simple communication system where multiple nodes are connected by a shared broadcast medium (like Ethernet or wireless). The nodes in the system use the following carrier-sense based medium access protocol. A node that receives a ... allows $Q$ to successfully avoid a collision between its proposed transmission and $P$'s ongoing transmission is _______.

Consider a simple communication system where multiple nodes are connected by a shared broadcast medium (like Ethernet or wireless). The nodes in the system use the follow...

gatecse

19.3k views

gatecse asked Feb 14, 2018

37 votes

9 answers

55

GATE CSE 2018 | Question: 14
Consider the following statements regarding the slow start phase of the TCP congestion control algorithm. Note that cwnd stands for the TCP congestion window and MSS window denotes the Maximum Segments Size: The cwnd increases by $2$ MSS on every successful acknowledgment The cwnd ... true Only $\text{(iv)}$ is true Only $\text{(i)}$ and $\text{(iv)}$ are true

Consider the following statements regarding the slow start phase of the TCP congestion control algorithm. Note that cwnd stands for the TCP congestion window and MSS wind...

gatecse

23.4k views

gatecse asked Feb 14, 2018

4 votes

3 answers

56

TCP Congestion control AIMD
Consider an instance of TCP's Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 KB and the threshold at the start of first transmission is 32 KB. Assume that 3 ... transmission and 1 duplicate ACK received during 6th transmission. what is the congestion window size at the end of 10th transmission?

Consider an instance of TCP’s Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 KB and the threshol...

Mk Utkarsh

2.0k views

Mk Utkarsh asked Jan 25, 2018

2 votes

1 answer

57

MadeEasy Test Series 2018: Computer Networks - Congestion Control
Consider the size of congestion window of a TCP connection be 36 KB when a timeout occurs. The round trip time of the connection is 200 μsec and the maximum segment size used is 2 KB. What is the time taken by the TCP connection to get back to 36 KB congestion window? A 2200 μsec B) 2400 μsec C) 2600 μsec D) 2800 μsec

Consider the size of congestion window of a TCP connection be 36 KB when a timeout occurs. The round trip time of the connection is 200 μsec and the maximum segment size...

khedkar devidas

1.5k views

khedkar devidas asked Jan 22, 2018

3 votes

1 answer

58

MadeEasy Test Series 2018: Computer Networks - Congestion Control
Consider an instance of TCP's Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 MSS and the threshold at the start is 1st transmission is 16 MSS. Assume TCP ... transmission of 7th packet . The congestion window size at the end of 14 RTT is _________ (in MSS).

Consider an instance of TCP’s Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 MSS and the thresho...

Rishabh Gupta 2

2.0k views

Rishabh Gupta 2 asked Jan 18, 2018

3 votes

1 answer

59

Madeeasy
Consider an instance of TCP's Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 MSS and the threshold at the start is 1st transmission is 16 MSS. Assume TCP use over a lossy link i. ... Will it increase additively by 1 MSS always or increase additively by the initial window size?Solution given as 12 MSS for this question.

Consider an instance of TCP’s Additive Increase Multiplicative Decrease (AIMD) algorithm where the window size at the start of slow start phase is 2 MSS and the thresho...

Surajit

1.1k views

Surajit asked Jan 18, 2018

1 votes

0 answers

60

Congestion Control
How to solve this?

How to solve this?

Shubham Kumar Gupta

263 views

Shubham Kumar Gupta asked Jan 17, 2018

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