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Chapter Overview

Chapter Overview. Networking requirements Network types and topologies Network cabling Local area network (LAN) communication Maintaining and troubleshooting networks. Basic Requirements of a Network. A network links computers for communicating and sharing information and resources.

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Chapter Overview

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  1. Chapter Overview • Networking requirements • Network types and topologies • Network cabling • Local area network (LAN) communication • Maintaining and troubleshooting networks

  2. Basic Requirements of a Network • A network links computers for communicating and sharing information and resources. • A network must provide • Connections • Communications • Services

  3. Local Area Networks • Cover a limited distance • Allow sharing of data, peripherals, software, and storage

  4. Wide Area Networks • Span relatively large areas • Typically consist of two or more LANs • Are connected using telephone or leased lines

  5. Types of Networks

  6. Star Topology

  7. Bus Topology

  8. Ring Topology

  9. Network Operating System • Network operating systems (NOSs) provide the ability to share file, print, and other services. • Computers can be servers, clients, or both. • The two types of NOSs are add-ons and built-in.

  10. Network Interface Cards (NICs) • Provide the physical connection between the computer’s expansion bus and the network cable • Boost the digital signal from the computer • Change the data stream from wide stream to narrow stream (parallel to serial conversion) • Move data to and from random access memory (RAM) and manage the flow of data to and from the network cable • Buffer the data from the computer

  11. Installation of the NIC

  12. Network Cabling

  13. Specifying the Right Cable

  14. LAN Communication • Ethernet uses Carrier Sense Multiple Access with Collision Detection (CSMA/CD) as well as bus topology. • Token ring allows only the station holding the token to transmit data.

  15. Network Protocols • A protocol is a set of rules that govern network communication. • A protocol suite is a group of protocols that can be used together. • The standard protocols are • Internetwork Packet Exchange/Sequenced Packet Exchange (IPX/SPX) • Networked Basic Input/Output System/NetBIOS Enhanced User Interface (NetBEUI) • Transmission Control Protocol/Internet Protocol (TCP/IP) • AppleTalk • Data Link Control (DLC)

  16. Extending a LAN • Repeaters • Bridges • Routers • Gateways

  17. Reduced bandwidth Loss of data Slow loading of programs and files Unauthorized software Traffic overloads Common mode failures Network security violations Maintaining and Troubleshooting Networks

  18. Network Certification • Microsoft Certified Product Specialist (MCPS) • Microsoft Certified Systems Engineer (MCSE) • Certified Novell Administrator (CNA) • Certified Novell Engineer (CNE)

  19. Chapter Summary • A network provides connections, communications, and services. • Networks are either peer-to-peer or server-based. • Network topology types are star, bus, and ring. • A NIC connects the computer to the network. • Network cable types are twisted-pair, coaxial, and fiberoptic. • A network protocol provides the rules for network communications. • Networks can be extended with repeaters, bridges, routers, and gateways.

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