This chapter covers the following official CCNA Routing and Switching 200-120 exam topics:
► Describe the purpose and basic operation of the protocols in the OSI and TCP/IP models.
► Predict the data flow between two hosts across a network.
► Identify common applications and their impact on the network.
Any complex operation requires a certain degree of structure to be understood. When dealing with millions of individuals all designing and building programs, protocols, and equipment that is intended to network together, the use of a theoretical model as a basis for understanding and interoperability is critical. This chapter reviews the Open Systems Interconnection (OSI) model and compares it to the TCP/IP model. ...