What is Go-Back-N and Selective Repeat?
Definition. In Go-Back-N if a sent frame is found suspected or damaged then all the frames are retransmitted till the last packet. In Selective Repeat, only the suspected or damaged frames are retransmitted.
How Selective Repeat ARQ outperforms Go-Back-N and stop and wait ARQ?
Go back N and Selective Repeat gives better efficiency than Stop and Wait ARQ. Buffer requirement in Selective Repeat is very large. If the system does not have lots of memory, then it is better to choose Go back N. Selective Repeat requires large number of bits in sequence number field.
Where are both Selective Repeat and Go-Back-N protocol is used?
Discussion Forum
| Que. | Both Go-Back-N and Selective-Repeat Protocols use a _________. |
|---|---|
| b. | sliding window |
| c. | sliding packet |
| d. | none of the above |
| Answer:sliding window |
What is the relation between stop and wait ARQ and Go-Back-N ARQ?
In Stop and Wait protocol, Acknowledgement type is individual. In GoBackN protocol, Acknowledgement type is cumulative. In Selective Repeat protocol, Acknowledgement type is individual. In Stop and Wait protocol, no specific order is needed at receiver end.
How does selective repeat protocol work?
In the selective repeat, the sender sends several frames specified by a window size even without the need to wait for individual acknowledgement from the receiver as in Go-Back-N ARQ. In selective repeat protocol, the retransmitted frame is received out of sequence.
What is automatic repeat request strategy and its application Explain go back and selective repeat ARQ?
Automatic repeat request (ARQ), also known as automatic repeat query, is an error-control method for data transmission that uses acknowledgements (messages sent by the receiver indicating that it has correctly received a packet) and timeouts (specified periods of time allowed to elapse before an acknowledgment is to be …
What are the differences between stop and wait automatic repeat request ARQ and go back n automatic repeat request?
Their major flow control protocols – Stop and Wait, Go Back N, and Selective Repeat.
- Stop and Wait – The sender sends the packet and waits for the ACK (acknowledgement) of the packet.
- Go Back N – The sender sends N packets which is equal to the window size.
- Selective Repeat –
What is automatic repeat reQuest strategy and its application Explain go back and selective repeat ARQ?
Why selective repeat is better than go back n?
Selective Repeat requires large number of bits in sequence number field. Selective Repeat is far better than Go back N in terms of retransmissions required. Bandwidth requirement is high because even if a single packet is lost, entire window has to be retransmitted.
What is Go back N protocol?
Go-Back-N protocol, also called Go-Back-N Automatic Repeat reQuest, is a data link layer protocol that uses a sliding window method for reliable and sequential delivery of data frames. It is a case of sliding window protocol having to send window size of N and receiving window size of 1.
Is selective reject and selective repeat same?
Selective Repeat ARQ/Selective Reject ARQ is a specific instance of the automatic repeat request (ARQ) protocol used to manage sequence numbers and retransmissions in reliable communications.