• Unit 2: The Basics of Protocols

    In life, protocols define the way we interact with other people – for example, the way we behave in a public place. In computer science, protocols are formal sets of rules that dictate the ways in which computers communicate with one another over a network medium. Protocols constitute the backbone of networking. The standard model for networking protocols and distributed applications is the International Standard Organization's Open System Interconnect (ISO/OSI) model. The Internet protocol stack TCP/IP (Transmission Control Protocol/Internet Protocol) model presents a group of protocols optimized for inter-computer communications and in particular for communications between multiple applications that may run on one computer. This unit provides an overview of the TCP/IP stack and its different layers, identifies the function of each layer, introduces the basics of how computers talk to one another in cyberspace using TCP/IP protocols, describes the techniques for wide area networks, and discusses common transmission media for the Internet.

    Completing this unit should take you approximately 2 hours.

    • 2.1: TCP/IP Reference Model

    • 2.2: Open Systems Interconnect (OSI) Reference Model

    • Unit 2 Assessment

      • Receive a grade