TCP/IP

       TCP/IP protocols were developed and start in use in 1980s. It becomes the most popular protocol now for computers to connect to the Internet and also in use for private networks. TCP/IP protocol consists of two protocols working together Transmission Control Protocol (TCP) and the Internet Protocol (IP). TCP/IP protocols were developed and start in use in 1980s.

       TCP/IP protocol basically will divide data into packets and send them through the network with a destination address within the packets. After data packets arrived the destination point, it will be checked and reassembled, so data will be back into one piece.

       IP protocol from the TCP/IP protocol will send the data between computers and careless about the if the destination computer receive the data or not, so the IP protocol will only delivers data without error checking. Without error checking IP protocol is not a reliable protocol, so TCP protocol is designed to work with the IP protocol. TCP protocol will do the error checking and make sure all data had been send and received correctly. There will be a add sequence number into the packet for error checking and when the data been received by destination, the destination computer have to send back a packet to check if the data has been received correctly.

       As the major Internet protocol today, TCP/IP will be wildly used and still have a long way to go.