Guide to Managing and Maintaining Your PC - Computer Peripherals | ELT 140, Study notes of Electrical and Electronics Engineering

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A+ Guide to Managing and

Maintaining your PC, 6e

Chapter 17

PCs on a Network (v0.9)

Introduction

•^

Topics covered in this chapter:^ – Technologies used to build networks– How Windows supports a network connection– How to connect a computer to a network– How network share resources are shared– How switches and routers interface networks– How to setup and secure a wireless network– How to troubleshoot a network connection

A+ Guide to Managing and Maintaining your PC, 6e

Sizes of Networks

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A network links two or more computers

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PAN (personal area network)^ – Consists of personal devices at close range

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LAN (local area network)^ – Covers a small local area such as a home, or office

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MAN (metropolitan area network)^ – Covers a large campus or city

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WAN (wide area network)^ – Covers a large geographical area; e.g., the Internet

A+ Guide to Managing and Maintaining your PC, 6e

Networking Technologies

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Factors driving network evolution:^ – The type of data the network is intended to support– The data capacity on the network– How a network is to fit among other networks

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Bandwidth (data throughput or line speed):^ – Analog systems: measured in cycles/sec (hertz or Hz)– Digital systems: measured in bps, Kbps, or Mbps

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As networks grow, the need for bandwidth grows

Additional Terms Used in Networking

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Network protocols: rules of communication

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Packets (datagrams or frames)^ – Basic unit of data transmitted on a network

Figure 17-

Ethernet network card showing its MAC address

A+ Guide to Managing and Maintaining your PC, 6e

Ethernet Cabling

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Types of cabling used:^ – Two kinds of twisted-pair

• Unshielded twisted pair (UTP): four pairs of twisted

wire

• Shielded twisted pair (STP): protected from EMI
  • Coaxial cable: single copper wire with braided shield– Fiber-optic: glass strands inside protective tubing

Table 17-

Variations of Ethernet and Ethernet cabling

Ethernet Topology

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Scale networks by adding switches

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Star bus topology:^ – Multiple switches form a bus network– Nodes connected to each switch form a star

Figure 17-

Nodes on an Ethernet network can be connected to one

another in a star or bus formation

Network Switch and Hub

Cable Tester