Which protocol uses sliding window flow control?
Transmission Control Protocol (TCP)
Transmission Control Protocol (TCP) uses a sliding window for flow control. Before you tune any TCP/IP settings, first understand how the TCP sliding window works.
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 ARQ in computer network?
Automatic Repeat Request (ARQ) is an error-control mechanism for data transmission which uses acknowledgements (or negative acknowledgements) and timeouts to achieve reliable data transmission over an unreliable communication link.
What is the maximum size of window in 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.
How do you make a sliding window protocol?
Types of Sliding Window Protocols
- Go – Back – N ARQ. Go – Back – N ARQ provides for sending multiple frames before receiving the acknowledgment for the first frame.
- Selective Repeat ARQ. This protocol also provides for sending multiple frames before receiving the acknowledgment for the first frame.
What is HDLC and PPP?
HDLC is an ISO-developed bit-oriented code-transparent synchronous data link layer protocol. PPP is a data link layer communication protocol for establishing a direct link between two nodes. 2. Stands for. HDLC stands for High-level Data Link Control.
Does TCP use ARQ?
TCP uses a variant of Go-Back-N ARQ to ensure reliable data transmission over the Internet protocol. However, it does not guarantee delivery of data packets. If TCP uses Selective Acknowledgement (SACK), Selective Repeat ARQ is used.
What are the two types of sliding window ARQ?
Sliding window protocol has two types: Go-Back-N ARQ. Selective Repeat ARQ.
Why receiver window size is 1 in Go-Back-N?
In Go back N, If receiver receives a frame whose sequence number is not what the receiver expects, then it silently discards that frame. All the following frames are also discarded. This is because receiver window size is 1 and therefore receiver can not accept out of order frames.
What is the maximum window size?
The TCP window size field controls the flow of data and is limited to 2 bytes, or a window size of 65,535 bytes. Since the size field can’t be expanded, a scaling factor is used. TCP window scale is an option used to increase the maximum window size from 65,535 bytes to 1 Gigabyte.
Why should the window size be less than or equal to 2m 1 in selective repeat ARQ justify your answer?
Window size should be less than or equal to half the sequence number in SR protocol. This is to avoid packets being recognized incorrectly. If the size of the window 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 HDLC PDF?
High-level data link control (HDLC) is a bit-oriented synchronous data link layer protocol used to ensure the error-free transmission of data to respective destinations and control the speed at which data is transmitted.