ch17 - Chapter17 NetworkingEssentials...

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Chapter 17 Networking Essentials
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Learn about hardware devices used for  networking Learn about the different types of networks Learn about the protocols and standards Windows  uses for networking Learn how to connect a computer to a network Learn about troubleshooting tools and tips for  network connections A+ Guide to Managing and Maintaining Your PC, 7e 2
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Computer network Two or more computers communicating Categorized by size and physical area covered PAN, LAN, Wireless LAN, MAN, WAN Bandwidth: data transmission rate Data throughput: actual network transmission  speed Latency: delays in network transmissions A+ Guide to Managing and Maintaining Your PC, 7e 3
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Internet Service Provider (ISP) Required for Internet connection Upload speed is slower than download speed Communicating devices require same protocol Internet protocol: TCP/IP (group of protocols) Data is broken into segments, segment are put into  packets A+ Guide to Managing and Maintaining Your PC, 7e 4 Figure 17-1 Use an ISP to connect to the Internet Courtesy: Course Technology/Cengage Learning
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A+ Guide to Managing and Maintaining Your PC, 7e 5 Table 17-1 Networking technologies
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A+ Guide to Managing and Maintaining Your PC, 7e 6 Table 17-1 Networking technologies (continued)
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Connect to the Internet Cable modem, DSL, fiber-optic, satellite, ISDN  (Integrated Services Digital Network) Cable modem communication Uses existing cable lines Always connected (always up) TV signals and PC data signals share same coax cable Cable modem converts PC’s digital signals to analog A+ Guide to Managing and Maintaining Your PC, 7e 7
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DSL (Digital Subscriber Line) Group of broadband technologies Wide range of speeds Uses ordinary copper phone lines and unused voice  frequencies Always connected Some DSL services offer connect on demand Asymmetric DSL (ADSL): one upload speed, faster  download speed Symmetric DSL (SDSL): equal bandwidths in both  directions A+ Guide to Managing and Maintaining Your PC, 7e 8
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Cable modem and DSL Sometimes purchased on a sliding scale Cable modem shares TV cable infrastructure with  neighbors Service may become degraded DSL uses dedicated phone line Must filter phone line static Similar setup for both Installation completed by provider or user Both use PC network port or USB port to connect cable  modem or DSL box A+ Guide to Managing and Maintaining Your PC, 7e 9
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Satellite provides high-speed Internet connections  in remote areas Available everywhere (airplanes) Disadvantage: latency when uploading A+ Guide to Managing and Maintaining Your PC, 7e 10 Figure 17-5 Communication by satellite can include television and Internet access Courtesy: Course Technology/Cengage Learning
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ch17 - Chapter17 NetworkingEssentials...

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