der IP. When IP forwards datagrams, individual datagrams may or may not arrive, and they probably will not arrive in the order in which they were sent. TCP adds the reliability that IP lacks. Also, security provisions such as limiting user access to certain machines can be implemented through TCP.TCP provides reliability by using checksums (error detection codes) on the data, sequence numbers in the TCP header, positive acknowledgment of data received, and retransmission of unacknowledged data.Most versions of the UNIX operating system comes with in-built support for networking. The default network protocol that UNIX systems are typically designed to talk is TCP/IP. TCP/IP is also known as the Internet Protocol Suite.TCP/IP is the protocol used by the Internet, a network of networks spread throughout the world connecting over two million machines with over twenty million users. It is not necessary to be connected to the Internet to use TCP/IP. However being able to connect to the Internet is one of the advantages of using TCP/IP.2.2 ISOC AND INTERNET STANDARDSThe development of Internet standards is not controlled by any one commercial organisation, even though it can be influenced by them. Instead the development of the Internet is performed by a number of different non-profit organisations including :The Internet Society,A non-governmental International organisation for global cooperation and coordination for the Internet and its internetworking technologies and applications.The Internet Architecture BoardThe Internet Architecture Board (IAB) is a body of the Internet Society responsible for overall architectural considerations in the Internet. It also serves to adjudicate disputes in the standards process.The Internet Engineering Task ForceThe Internet Engineering Task Force (IETF) is the protocol engineering and development arm of the Internet. The IETF is a large open international community of network designers, operators, vendors...
