Search

Transmission Control Protocol (TCP) is a communications standard that enables application programs and computing devices to exchange messages over a network. Since the 1970s, several TCP variants have been introduced to deal with the fast increasing network capacities, especially in high Bandwidth Delay Product (high-BDP) networks. The different variants are: TCP Tahoe, TCP Reno, TCP New Reno, TCP Linux, TCP Vegas, TCP Sack, etc. TCP provides the quality of performing consistently well and End-To-End (ETE) delivery of packets in the network. Each of these TCP variants has its own mechanism against the problem, some of these approaches can estimate available bandwidths and some react based on network loss and/or delay changes. It is essential to perform a comparison between the high-speed TCP variants that have a high standard of importance, especially after a quick growth of networks bandwidths. In this paper, TCP variants that are implemented in Linux have been evaluated using NS2 network simulator. This performance evaluation presents the advantages and disadvantages in terms of Packet Delivery Ratio (PDR), ETE delay and throughput using different applications like File Transfer Protocol (FTP), Simple Mail Transfer Protocol (SMTP) and Hyper Text Transfer Protocol (HTTP). [ABSTRACT FROM AUTHOR]