Importance of TCP/IP and Its Use in the Internet
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What? TCP/IP? Who cares. Fact is, without TCP/IP there would be no Internet. TCP (Transmission Control Protocol) and IP (Internet Protocol) were the protocols the military developed in its research aiming at developing communication using the early forms of computer. Computers before, were the size of a room. The military was forced to connect different types of machine because not every branch of the military was using the same machine. The first Internet delivered a few basic services like file transfer, electronic mail to name a few. TCP/IP is composed of layers. Each layer has its own responsibility. IP is responsible for moving data from computer to computer. IP forwards each packet based on a four-byte destination address (the IP number). TCP is responsible for ensuring correct delivery of data from computer to computer. Because data can be lost in the network, TCP adds support to detect errors or lost data and to trigger retransmission until the data is correctly and completely received. In short, IP is used to send the data, while TCP verifies that it is sent correctly.
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