Recent questions tagged flow-control-methods

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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.

asked Mar 16, 2019 in Computer Networks by ajaysoni1924 Boss (10.9k points) | 43 views

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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)

asked Mar 16, 2019 in Computer Networks by ajaysoni1924 Boss (10.9k points) | 22 views

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3

Gateforum mock 2

asked Jan 20, 2019 in Computer Networks by Prince Sindhiya Loyal (5.9k points) | 48 views

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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

asked Jan 17, 2019 in Computer Networks by MRINMOY_HALDER Active (4.1k points) | 122 views

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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?

asked Jan 13, 2019 in Computer Networks by Shivam Kasat Active (3.2k points) | 82 views

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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!

asked Dec 22, 2018 in Computer Networks by junaid ahmad Loyal (8.6k points) | 67 views

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

asked Dec 21, 2018 in Computer Networks by Markzuck Junior (675 points) | 187 views

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8

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

asked Dec 17, 2018 in Computer Networks by Markzuck Junior (675 points) | 69 views

+1 vote

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9

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.

asked Dec 17, 2018 in Computer Networks by Subham Nagar Active (1.1k points) | 391 views

+2 votes

1 answer

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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]

asked Dec 9, 2018 in Computer Networks by suneetha (447 points) | 260 views

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11

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?

asked Nov 10, 2018 in Computer Networks by Ayush Upadhyaya Boss (30.6k points) | 97 views

+1 vote

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12

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?

asked Oct 15, 2018 in Computer Networks by sushmita Boss (17.8k points) | 175 views

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13

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%

asked Oct 6, 2018 in Computer Networks by balaganesh (131 points) | 168 views

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14

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

asked Oct 5, 2018 in Computer Networks by balaganesh (131 points) | 77 views

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15

Flow control methods

asked Sep 17, 2018 in Computer Networks by Sambhrant Maurya Active (4k points) | 79 views

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16

Ace Test Series: Computer Networks - Flow Control Methods

asked Dec 7, 2016 in Computer Networks by thor Loyal (6.8k points) | 66 views

+2 votes

2 answers

17

Ace Test Series: Computer Networks - Flow Control Methods
Should the answer be 5 or 6?

asked Dec 7, 2016 in Computer Networks by Kai Active (2.6k points) | 232 views

+1 vote

1 answer

18

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

asked Dec 5, 2016 in Computer Networks by thor Loyal (6.8k points) | 439 views

+2 votes

1 answer

19

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?

asked Nov 5, 2016 in Computer Networks by Aboveallplayer Boss (18.1k points) | 309 views

+2 votes

3 answers

20

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 _____.

asked Sep 23, 2016 in Computer Networks by nvnverma18 (35 points) | 399 views

+1 vote

3 answers

21

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 _________.

asked Sep 8, 2016 in Computer Networks by Pankaj Joshi Active (2.7k points) | 724 views

+3 votes

1 answer

22

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

asked Aug 25, 2016 in Computer Networks by cse7 Active (1.2k points) | 278 views

+2 votes

2 answers

23

MadeEasy Test Series: Computer Networks - Flow Control Methods
how answer is 18?not 19 Station X needs to send a message consisting of 12 packets to station Y using a siding window (window size 4) and go-back-n error control strategy. All packets are ready and immediately available for ... Y ever got lost), then the number of packets that X will transmit for sending the message to Y are ____

asked Aug 24, 2016 in Computer Networks by Aboveallplayer Boss (18.1k points) | 242 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.

asked Jul 25, 2016 in Computer Networks by mohit chawla Active (2.6k points) | 425 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 _______.

asked Feb 1, 2016 in Computer Networks by Akanksha Kesarwani Junior (989 points) | 318 views

+1 vote

2 answers

26

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

asked Nov 21, 2015 in Computer Networks by shikharV Active (3.5k points) | 708 views

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