Chapter1
Network Models
“Each person must live their life as a model for others.”
—Rosa Parks
In this chapter, you will learn how to
■ Describe how the OSI seven-layer model helps technicians understand and troubleshoot networks
■ Explain the major functions of networks with the OSI seven-layer model
Networks enable connected hosts—computers—to share resources and access resources. The sharing host—a server—runs special software to enable the accessing host—a client—to get the desired resource. That resource can be any number of things, from a Web page on the Internet to files on a server in your office. It might even be a printer or a camera. ...
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