ABSTRACT

Nowadays Internet applications are making revolutions m the world, users are increasing gradually, the act of acquiring electronic commerce, VoIP, video on demand, collaborative scientific projects , virtual environments , video conferencing, telecommuting and other customer services, all users want the quality of services (QoS) in concurrent. The transport layer provides end-to-end communication to processes applications over the Internet and plays a major role in providing QoS. This QoS provided over transport layer protocols via Stream Control Transmission Protocol (SCTP) Transmission Control Protocol (TCP) and User Datagram Protocol. (UDP). SCTP developed for Internet Protocol (IP) based network and several improvement obligations not found in UDP and TCP as well as compared to features, SCTP provides two. new features multihoming and multistreaming. All of these protocols are an important subject to the type of data which is being transmitted. This thesis presents comparative analysis between three transport layer protocols i.e. UDP, TCP and SCTP. These comparative analyses are mainly made of the text, voice and video data. Different QoS parameters like packet loss, throughput, and delay in transmission, average delay, and variance in delay were used to check the QoS over the transmission of different data types. All these QoS parameters were tested for all these protocols and results were collected. All the simulations were carried out in
Network Simulator 2 (NS-2). After collecting the results and plotting them over
graphs it was observed that these three protocols works efficiently with different data types and has a different impact on QoS parameters which were tested. The. experimental results show that the results of successful data transmission, delay, and other factors depend on the type of data which you are sending. These three different protocols had different results of QoS parameter for the transmission of different data types i.e. text, voice, and video data.