Summary

Chapter 8: Fundamental Networks 3This chapter provides an overview of network principles, standards, and purposes. The followingtypes of networks are discussed in this chapter:■■■Local-area network (LAN)Wide-area network (WAN)Wireless LAN (WLAN)This chapter discusses the different types of network topologies, protocols, and logicalmodels as well as the hardware needed to create a network. Configuration, troubleshooting,and preventive maintenance also are covered. In addition, you will learn about network software,communication methods, and hardware relationships.Explain the Principles of NetworkingNetworks are systems that are formed by links. Websites that allow individuals to link toeach other’s pages are called social networking sites. A set of related ideas can be called aconceptual network. The connections you have with all your friends can be called your personalnetwork.People use the following networks every day:■■■■■Mail delivery systemTelephone systemPublic transportation systemCorporate computer networkThe InternetComputers can be linked by networks to share data and resources. A network can be as simpleas two computers connected by a single cable or as complex as hundreds of computersconnected to devices that control the flow of information. Converged data networks caninclude general-purpose computers, such as PCs and servers, as well as devices with morespecific functions, including printers, phones, televisions, and game consoles.All data, voice, video, and converged networks share information and use various methodsto direct how this information flows. The information on the network goes from one placeto another, sometimes via different paths, to arrive at the appropriate destination.The public transportation system is similar to a data network. The cars, trucks, and othervehicles are like the messages that travel within the network. Each driver defines a starting