The Functions of Transmission Control Protocol/Internet Protocol

440 WordsJan 31, 20182 Pages
TCP/IP stands for Transmission Control Protocol/Internet Protocol and is a network protocol used on the internet, LANs and WANs. The TCP/IP is a layered protocol hence it has five layers which are the physical, data link, network, transport, and application. Data link layer The data link layer is found between the physical layer and the network layer. Its chief role is to transfer data from the network layer of one component to the network layer of another component and to convert raw bit stream into frames. Functions of the link layer The link layer transfers bits across the link and in some cases add reliability to the raw communication link by adding a header and trailer to the data accessible by the network layer. The link layer also does framing, error detection, and physical addressing. Likewise, the layer performs access control where it defines the components turn to send data or control the link. The data link layer to some extend can carry out flow control; flow control gives a receiver humble time to process data received in its buffers. Other services provided by the layer are multiplexing, authentication, and encryption. Protocols Two types of networks that exist at the data link layer are Broadcast Networks and Point-to –Point Networks. In Broadcast Networks, a single communication channel is shared by all the stations while pairs of hosts are connected directly to each other in Point-to –Point Networks. Virtually all LANs are broadcast while WANS

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