Week Twelve - A+ Guide to Managing and Maintaining Your PC,...

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A+ Guide to Managing and Maintaining Your PC, 7e Chapter 17 Networking Essentials
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A+ Guide to Managing and Maintaining Your PC, 7e 2 Objectives 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
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Networking Technologies 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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Networking Technologies (cont’d.) 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
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Broadband Technologies 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 5
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Broadband Technologies (cont’d.) 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 6
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Broadband Technologies (cont’d.) 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 7
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Broadband Technologies (cont’d.) Fiber optic dedicated point-to-point (PTP) – No line sharing – Broadband fiber-optic cable • Television, Internet data, voice communication – Verizon technology: Fiber Optic Service (FiOS) – Cabling endpoints: carrier dependent – Upstream and downstream speeds and prices vary A+ Guide to Managing and Maintaining Your PC, 7e 8
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Wireless Technologies Use radio waves or infrared light – Useful in places where cables difficult to install 802.11 wireless (Wi-Fi or Wireless Fidelity) – 802.11g and 802.11b • 2.4 GHz frequency Range, 100m distance – 802.11n: Multiple input/multiple output (MIMO) • 2.4 GHz and 5 GHz range, 600 Mbps speed possible – 802.11a: no longer widely used A+ Guide to Managing and Maintaining Your PC, 7e 9
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Wireless Technologies (cont’d.) Security methods required
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Week Twelve - A+ Guide to Managing and Maintaining Your PC,...

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