What are the differences between Go Back N and Selective Repeat?
The main difference between these two protocols is that after finding the suspect or damage in sent frames go-back-n protocol re-transmits all the frames whereas selective repeat protocol re-transmits only that frame which is damaged.
Which one is better go back n and Selective Repeat )? And why?
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. Sender Window is of size N. Go-Back-N is easier to implement.
What are the pros and cons between GO BACK N and Selective Repeat?
Go-back-N: pro: single timer, simple con: not efficient, waste bandwidth when a packet is lost/broken.
Which protocol go back N or Selective Repeat more efficient use of network bandwidth Why?
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 the use of selective repeat protocol?
An alternative strategy, the selective repeat protocol, is to allow the receiver to accept and buffer the frames following a damaged or lost one. Selective Repeat attempts to retransmit only those packets that are actually lost (due to errors) : Receiver must be able to accept packets out of order.
Does TCP use Go-Back-N or Selective Repeat?
TCP standard doesn’t specify what to do, but most receiver implementations buffer out-of-order packets. GBN or Go-back-N (the sender resends the entire window of packets starting with “i”), or SR / Selective Repeat (sender retransmits only “i” and hopes other packets will reach).
Why do we need Selective Repeat?
What is the advantage of selective repeat ARQ over Go Back N ARQ?
“In the Go-Back-N ARQ Protocol, we can send several frames before receiving acknowledgments. If a frame is lost or damaged, all outstanding frames sent before that frame are resent. In the Selective- Repeat ARQ protocol we avoid unnecessary transmission by sending only the frames that are corrupted or missing.
Does TCP use go back N or Selective Repeat?
Does TCP use selective repeat or Go-Back-N?
What is automatic repeat request strategy and its application Explain go back and Selective Repeat ARQ?
ARQ stands for Automatic Repeat Request also known as Automatic Repeat Query. ARQ is an error-control strategy used in a two-way communication system. It is a group of error-control protocols to achieve reliable data transmission over an unreliable source or service.
What is selective retransmission explain?
When an RTP endpoint sends an NLP, a copy of the data portion of the NLP is kept until the remote RTP endpoint acknowledges receipt of the data. HPR support uses a selective retransmission mechanism where data is not retransmitted unless instructed to do so by the remote RTP endpoint. …
What’s the difference between Selective Repeat and go-back-N?
Both Go-Back-N Protocol and Selective Repeat Protocol are the types of sliding window protocols. The main difference between these two protocols is that after finding the suspect or damage in sent frames go-back-n protocol re-transmits all the frames whereas selective repeat protocol re-transmits only that frame which is damaged.
How does Selective Repeat Work with out of order packets?
In this case, the receiver maintains a buffer to contain out-of-order packets and sorts them.The sender selectively re-transmits the lost packet and moves the window forward. As Selective Repeat supports receiving out-of-order packets (it sorts the window after receiving the packets), it uses Independent Acknowledgement to acknowledge the packets.
What is the difference between Selective Repeat and sliding window?
Definition of Selective Repeat. Selective repeat is also the sliding window protocol which detects or corrects the error occurred in datalink layer. The selective repeat protocol retransmits only that frame which is damaged or lost. In selective repeat protocol, the retransmitted framed is received out of sequence.
How is retransmitted frames received in Selective Repeat protocol?
In selective repeat protocol, the retransmitted framed is received out of sequence. The selective repeat protocol can perform the following actions The receiver is capable of sorting the frame in a proper sequence, as it receives the retransmitted frame whose sequence is out of order of the receiving frame.