TCP / IP is synonymous with a set of protocols, which includes a number of agreements, the composition of the TCP / IP protocol suite. It is to become a five-simplified model of the OSI model. Each layer network call its next layer provided to complete their needs.
Application layer: is responsible for communication between application programs. Such as: the Simple Mail Transfer (SMTP), File Transfer Control Protocol (FTP), remote network access protocol (Telnet) and so on.
Transport Layer: responsible for data transfer between two hosts, such as Transmission Control Protocol (TCP), to ensure a reliable transmission of data from the source host to the destination
Network layer: responsible for providing the basic data packet transfer function, so that every piece of data packets can reach the destination host (but does not check whether the correct acceptance) (IP protocol)
The data link layer: and responsible for transmitting the identification data frames between devices. Device such as a drive card, frame synchronization, collision detection, and the like check data difference
Physical layer: responsible for transmitting an optical / electrical signal. Capacity physical layer determines the maximum transmission rate, transmission distance, and interference, the hub (the Hub) operate at the physical layer.
Comparison with the OSI model: