The sender will send a complete window of packets before receiving an acknowledgement for the first packet in the window. The sender is maintaining a timer for every packet sent, and any unacknowledged packet in a certain time is resent. Every packet sent from the sender side must be acknowledged by the receiver. To hold the outgoing and incoming packets both the sender and receiver maintains a finite buffer. This paper is small contribution in this direction.Sliding window protocol is a transmission control protocol. Analytical and graphical teaching approach is always very effective and efficient. The challenges of teaching computer networking to large classes can be successfully tackled by the use of an interactive network simulator. The simulator is a tool for demonstrating the various protocols, algorithms and to serve as an aid in the better understanding of the protocols. The designed simulator will perform the basic operation of protocol and provide the direct interface to user to enter the parameter which provide the results in the form of data and graphical plots. This paper deals with the simulation and analysis of the Stop & Wait protocol in MATLAB environment. Sliding Window protocol can be subdivided in Stop and Wait, Go Back N and Selective Reject Protocol. Various Popular protocols like Transfer Control Protocol (TCP) and High Level Data Link Control Protocol (HDLC) are based on the Sliding Window Protocol. Sliding Window (SW) protocol, is one of the most important protocols that have been used out currently. Protocols are the set of rules, which are used for the reliable communication of data. Emergence of computer networks and internet brings a tremendous change in the field of communication. In the field of communication safe and reliable transmission of data is extremely important issue.
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