What is sliding window protocol explain?
A sliding window protocol is a feature of packet-based data transmission protocols. Sliding window protocols are used where reliable in-order delivery of packets is required, such as in the data link layer (OSI layer 2) as well as in the Transmission Control Protocol (TCP).
What is called selective repeat?
Selective Repeat is part of the automatic repeat request (ARQ). With selective repeat, the sender sends a number of frames specified by a window size even without the need to wait for individual ACK from the receiver as in Go-Back-N ARQ.
What are the types of sliding window protocol?
Sliding window protocol has two types:
- Go-Back-N ARQ.
- Selective Repeat ARQ.
What are the differences between Go-Back-N sliding window protocol and selective repeat sliding window protocol explain with example?
It is a case of sliding window protocol having to send window size of N and receiving window size of 1….Difference between Go-Back-N and Selective Repeat Protocol.
| Key | Go-Back-N | Selective Repeat |
|---|---|---|
| Receiver Window Size | Receiver Window Size is 1. | Receiver Window Size is N. |
| Complexity | Go-Back-N is easier to implement. | In Selective Repeat, receiver window needs to sort the frames. |
What is the importance of sliding window protocol?
The sliding window provides several benefits: It controls the speed of transmission so that no fast sender can overwhelm the slower receiver; It allows for orderly delivery, as we will show; It allows for retransmission of lost frames, specific retransmission policy depends on the specific implementations.
What are the advantages of sliding window protocol?
The sliding window provides several benefits:
- It controls the speed of transmission so that no fast sender can overwhelm the slower receiver;
- It allows for orderly delivery, as we will show;
- It allows for retransmission of lost frames, specific retransmission policy depends on the specific implementations.
What is receiver window size in selective repeat sliding window protocol is m 3?
Receiver stores correct packets until they can be delivered in order to the higher layer. In Selective Repeat ARQ, the size of the sender and receiver window must be at most one-half of 2^m.
What is the advantages of sliding window protocol?
What is better Selective Repeat or Go-Back-N?
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. Thus, if error rate is high, it wastes a lot of bandwidth.
Which of the following is sliding window protocol?
Selective Repetitive ARQ It is a data link layer protocol that facilitates a sliding window method. The Goback-N ARQ protocol operates well if it has fewer errors. In this protocol, the sender window size is always similar to the size of the receiver window. The size of the sliding window is continually greater than 1.
Why is window size in selective repeat?
This is to avoid packets being recognized incorrectly. If the windows size is greater than half the sequence number space, then if an ACK is lost, the sender may send new packets that the receiver believes are retransmissions.
What is advantage of sliding window protocol?
How do you measure a window for a sliding window protocol?
Maximum window size = 1 + 2*a where a = Tp/Tt Minimum sequence numbers required = 1 + 2*a. All the packets in the current window will be given a sequence number. Number of bits required to represent the sender window = ceil(log2(1+2*a)).
What advantages does Selective Repeat sliding window protocol offer over Go-Back-N protocol?
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.
What are the advantages of selective repeat protocol over Go-Back-N protocol?
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 are the benefits of sliding windows?
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What is the efficiency of sliding window protocol?
Sliding Window protocol efficiency is formulated as N/(1+2a) where N is no. of window frames and a is ratio of propagation delay vs transmission delay. Stop and Wait protocol is half duplex in nature. Sliding Window protocol is full duplex in nature.
What is selective repeat protocol in computer networks?
Selective Repeat Protocol in computer networks is a Sliding Window Protocol. Selective Repeat ARQ or SR Protocol is an implementation of sliding window protocol like Go back N Protocol.
What is the Selective Repeat ARQ protocol?
So, we use the Selective Repeat ARQ protocol. In this protocol, the size of the sender window is always equal to the size of the receiver window. The size of the sliding window is always greater than 1. If the receiver receives a corrupt frame, it does not directly discard it.
What is sliding window protocol?
Sliding Window Protocol. Sliding window protocols are data link layer protocols for reliable and sequential delivery of data frames. The sliding window is also used in Transmission Control Protocol. In this protocol, multiple frames can be sent by a sender at a time before receiving an acknowledgment from the receiver.
What is the size of the sender window in go back protocol?
It is a data link layer protocol that uses a sliding window method. In this, if any frame is corrupted or lost, all subsequent frames have to be sent again. The size of the sender window is N in this protocol. For example, Go-Back-8, the size of the sender window, will be 8. The receiver window size is always 1.