The Transmission Control Protocol/Internet Protocol (TCP/IP) suite of protocols was developed as part of the research done by the Defense Advanced Research Projects Agency (DARPA). Later, TCP/IP was included with the Berkeley Software Distribution of UNIX.
The Internet protocols can be used to communicate across any set of interconnected networks. They are equally well suited for both LAN and WAN communication.
The Internet protocol suite includes not only Layer 3 and Layer 4 specifications (such as IP and TCP), but also specifications for such common applications as e-mail, remote login, terminal emulation, and file transfer.
Concept Questions
Demonstrate your knowledge of these concepts by answering the following questions in the space provided.
The TCP/IP protocol stack has the following components: Protocols to support file transfer, e-mail, remote login, and other applications. Reliable and "unreliable" transports. Connectionless datagram delivery at the network layer ICMP provides control and message functions at the network layer.
The TCP/IP protocol stack maps closely to the lower layers of the OSI reference model. What function do the application protocols perform?
The transport layer performs two functions. What are they?