Recent questions tagged selective-repeat / GATE Overflow for GATE CSE

1 votes

1 answer

1

Selective Repeat
Consider a sliding window protocol that uses Selective Repeat, the sender sliding window size is 32. The sequence number of the frame to be sent after sending 200 frames ___________

Consider a sliding window protocol that uses Selective Repeat, the sender sliding window size is 32. The sequence number of the frame to be sent after sending 200 frames ...

amitarp818

592 views

amitarp818 asked Sep 18, 2023

0 votes

1 answer

2

Computer Networks - Andrew Tanenbaum - The Data Link Layer
Consider a bidirectional link that uses Selective Repeat ARQ with a window size of N = 7. Suppose that all frames are one unit long and use a time-out value of 2. Assume that the one-way propagation delay is 0.5 time unit, the ... A sends 8 frame in a row, starting at t = 0. All frames are received correctly, except frame 3 is lost.

Consider a bidirectional link that uses Selective Repeat ARQ with a window size of N = 7. Suppose that all frames are one unit long and use a time-out value of 2. Assume ...

suenolivia

1.0k views

suenolivia asked Feb 27, 2023

2 votes

1 answer

3

Solution is 2 or 3?
Should the solution for the above question be 2 or 3?

Should the solution for the above question be 2 or 3?

h4kr

519 views

h4kr asked Dec 9, 2022

0 votes

0 answers

4

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 ... I feel is not possible because here we are talking about cumulative ack not independent. So how is this reason valid?

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 ...

Ananya Nayak

490 views

Ananya Nayak asked Dec 25, 2021

1 votes

2 answers

5

Andrew S. Tanenbaum Edition 5th Exercise 3 Question 33 (Page No. 254)
Compute the fraction of the bandwidth that is wasted on overhead (headers and retransmissions) for protocol selective repeat on a heavily loaded 50-kbps satellite channel with data frames consisting of 40 header and 3960 data bits. ... frames is 1%, and the error rate for NAK frames is negligible. The sequence numbers are 8 bits.

Compute the fraction of the bandwidth that is wasted on overhead (headers and retransmissions)for protocol selective repeat on a heavily loaded 50-kbps satellite channel ...

ajaysoni1924

910 views

ajaysoni1924 asked Mar 16, 2019

1 votes

1 answer

6

Andrew S. Tanenbaum Edition 5th Exercise 3 Question 30 (Page No. 253)
Consider the operation of protocol 6 ( Selective repeat Protocol) over a 1-Mbps perfect (i.e., error-free) line. The maximum frame size is 1000 bits. New packets are generated 1 second apart. ... acknowledgement timer were eliminated, unnecessary timeouts would occur. How many times would the average message be transmitted?

Consider the operation of protocol 6 ( Selective repeat Protocol) over a 1-Mbps perfect (i.e., error-free) line. The maximum frame size is 1000 bits. New packets are gene...

ajaysoni1924

1.2k views

ajaysoni1924 asked Mar 16, 2019

0 votes

0 answers

7

Andrew S. Tanenbaum Edition 5th Exercise 3 Question 25 (Page No. 253)
In protocol 6( Selective repeat Protocol ), when a data frame arrives, a check is made to see if the sequence number differs from the one expected and no nak is true. If both conditions hold, a NAK is ... auxiliary timer is started. Suppose that the else clause were omitted. Would this change affect the protocol's correctness?

In protocol 6( Selective repeat Protocol ), when a data frame arrives, a check is made to see if the sequence numberdiffers from the one expected and no nak is true. If b...

ajaysoni1924

595 views

ajaysoni1924 asked Mar 16, 2019

2 votes

1 answer

8

Made easy test series computer network gbn Sr sliding window protocol
Consider two computers A and B are connected through a network of 30 Mbps. Assume the distance between them is 3000km and the signal propagation speed is same as the speed of light and the packet size is 12 KB. What is the minimum number of bits ... -N and selective repeat protocol? A . 5 and 6 B. 6 and 7 C. 6 and 6 D. 7 and 8

Consider two computers A and B areconnected through a network of 30 Mbps. Assume the distance between them is 3000km and the signal propagation speed is same as the speed...

Ram Swaroop

1.7k views

Ram Swaroop asked Jan 22, 2019

1 votes

0 answers

9

Selective Repeat ARQ
If the sender window size is 128 using selective repeat ARQ, then the sequence number of the frame to be sent after sending 400 frames is __________

If the sender window size is 128 using selective repeat ARQ, then the sequence number of the frame to be sent after sending 400 frames is __________

Sambhrant Maurya

1.2k views

Sambhrant Maurya asked Sep 23, 2018

2 votes

1 answer

10

Selective Repeat
If the Sender Window size is 128 using selective repeat ARQ. Then the sequence number of frame to be send after sending 400 th frame is ?

If the Sender Window size is 128 using selective repeat ARQ. Then the sequence number of frame to be send after sending 400 th frame is ?

Na462

7.5k views

Na462 asked Sep 15, 2018

2 votes

3 answers

11

Sliding window protocol
Station A needs to send a message consisting of 10 packets to station B using a sliding window of size 4. All packets are ready and can be transferred immediately.Selective repeat and GBN are used at 2 different times and every 5th packet get lost for ... of transmissions that A has to make in selective repeat and GBN respectively to ensure safe delivery to B. Then x+y= ?

Station A needs to send a message consisting of 10 packets to station B using a sliding window of size 4. All packets are ready and can be transferred immediately.Selecti...

Sumit Singh Chauhan

6.3k views

Sumit Singh Chauhan asked Aug 2, 2018

1 votes

1 answer

12

Transmission Protocol
Suppose, In Selective Repeat Protocol 10 packets are sent and every 4th packet is lost. Then, 1 2 3 4 4 5 6 7 7 8 9 10 10 {bold denote lost packets, so retransmitted!} Is this the right order of transmission of packet no.??

Suppose, In Selective Repeat Protocol 10 packets are sent and every 4th packet is lost. Then, 1 2 3 4 4 5 6 7 7 8 9 10 10 {bold denote lost packets, so retransmitted!} I...

Naveen Kumar 3

1.4k views

Naveen Kumar 3 asked May 8, 2018

2 votes

2 answers

13

Sliding window protocol
Why sender and receiver window size are same in selective repeat?

Why sender and receiver window size are same in selective repeat?

JAYKISHAN

748 views

JAYKISHAN asked May 3, 2018

2 votes

1 answer

14

MadeEasy Test Series: Computer Networks - Network Flow

MIRIYALA JEEVAN KUMA

342 views

MIRIYALA JEEVAN KUMA asked Jan 2, 2018

1 votes

1 answer

15

MadeEasy Test Series: Computer Networks - Sliding Window
I'm getting 81, but the answer given is 80. Please verify and explain.

I'm getting 81, but the answer given is 80. Please verify and explain.

charul

514 views

charul asked Dec 22, 2017

2 votes

2 answers

16

Selective Repeat
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 repeat sliding window protocol ... processing delays at nodes are negligible. Then, the minimum size in bits of the sequence number field has to be _________.

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 o...

Shubham Kumar Gupta

1.7k views

Shubham Kumar Gupta asked Dec 16, 2017

6 votes

2 answers

17

selective repeat || ACK falling outside of sender's window
.With the SR protocol, it is possible for the sender to receive an ACK for a packet that falls outside of its current window.?? pleasee explain with example

.With the SR protocol, it is possible for the sender to receive an ACK for a packet that falls outside of its current window.??pleasee explain with example

Akriti sood

4.4k views

Akriti sood asked Jan 3, 2017

7 votes

2 answers

18

NW-Sliding Window Protocol No of Sequence number bit
Consider a network connecting two systems located $2000$ kilometers apart. The bandwidth of the network is $64 \text{ Mbps}$. The propagation speed of the media is $2/3$ of the speed of light in vacuum. It is needed to ... processing delays at nodes are negligible. Then, the minimum size in bits of the sequence number field has to be __________.

Consider a network connecting two systems located $2000$ kilometers apart. The bandwidth of the network is $64 \text{ Mbps}$. The propagation speed of the media is $2/3$ ...

KISHALAY DAS

1.4k views

KISHALAY DAS asked Dec 11, 2016

5 votes

1 answer

19

Acknowledgement Number in Selective Repeat protocol.
Consider a sliding window protocol that uses Selective Repeat , the sender sliding window size is 32 . The sequence number of the frame to be sent after sending 200 frames ______ After receiving first 100 frames the acknowledgement number that is piggybacked by the receiver along with data frame is _______

Consider a sliding window protocol that uses Selective Repeat , the sender sliding window size is 32 .The sequence number of the frame to be sent after sending 200 frames...

biranchi

3.1k views

biranchi asked Nov 27, 2016

2 votes

3 answers

20

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 _________.

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 o...

Pankaj Joshi

2.1k views

Pankaj Joshi asked Sep 7, 2016

9 votes

1 answer

21

Question 3) Sliding Window Protocol
In what protocols it is possible for sender to receive an ACK for a packet that falls outside of its window . Please justify ur answer . a)Stop and wait b)SR c) GBN d) all My approach Ws = 3 t=0 sends packets 1,2,3 t=1 reveiver ACK 1,2,3 ... t=3 This is outside window The above is true for GBN and SR . What about Stop and Wait ? Answer is given as Stop and wait

In what protocols it is possible for sender to receive an ACK for a packet that falls outside of its window . Please justify ur answer .a)Stop and waitb)SRc) GBNd) allMy ...

pC

4.6k views

pC asked Jul 8, 2016

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