Chapter 1

Describe How a Network Works

The Cisco CCNA exam objectives covered in this chapter include the following:

  • Describe the purpose and functions of various network devices.
  • Select the components required to meet a network specification.
  • Use the OSI and TCP/IP models and their associated protocols to explain how data flows in a network.
  • Describe common networked applications, including web applications.
  • Describe the purpose and basic operation of the protocols in the OSI and TCP models.
  • Describe the impact of applications (Voice over IP and Video over IP) on a network.
  • Interpret network diagrams.
  • Determine the path between two hosts across a network.
  • Describe the components required for network and Internet communications.
  • Identify and ...

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