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Appendix CComputer Networking
Information Systems TodayInformation Systems TodayLeonard Jessup and Joseph ValacichLeonard Jessup and Joseph Valacich
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Appendix C Objectives
Understand networking fundamentalsUnderstand networking fundamentals Understand network services and Understand network services and
transmission mediatransmission media Understand network software and hardwareUnderstand network software and hardware
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Networking Fundamentals
Network consists of:Network consists of: ServersServers – provides services – provides services ClientsClients – requests services – requests services PeersPeers – both requests and provides services – both requests and provides services
Types of networksTypes of networks Server-centricServer-centric networks networks Peer-to-peerPeer-to-peer networks networks
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Networking Fundamentals
Network ServicesNetwork Services File servicesFile services Print servicesPrint services Message servicesMessage services Applications servicesApplications services
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Networking Fundamentals
Network Operating System (NOS)Network Operating System (NOS) Two parts:Two parts:
System software that runs on the serverSystem software that runs on the serverClient software on each workstationClient software on each workstation
ExamplesExamplesBanyan VinesBanyan VinesNovell NetWareNovell NetWareMicrosoft LAN ManagerMicrosoft LAN ManagerLANtasticLANtastic
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Networking Fundamentals
Transmission MediaTransmission Media The pathway to send data and information The pathway to send data and information
between two or more entities on a networkbetween two or more entities on a network BandwidthBandwidth – transmission capacity – transmission capacity AttenuationAttenuation – weakening of a signal over distance – weakening of a signal over distance EMIEMI – electromagnetic interference – electromagnetic interference
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Networking Fundamentals
Cable MediaCable Media Twisted pair cableTwisted pair cable Coaxial cable (“coax”)Coaxial cable (“coax”) Fiber-optic cableFiber-optic cable
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Networking Fundamentals
Wireless MediaWireless Media Infrared line of sightInfrared line of sight High-frequency radioHigh-frequency radio
Pager – one way wirelessPager – one way wirelessCellular phone – two way wirelessCellular phone – two way wirelessWireless LANsWireless LANs
MicrowaveMicrowaveTerrestrialTerrestrialSatelliteSatellite
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Network Software and Hardware
Media access controlMedia access control Rules that govern how a workstation gains Rules that govern how a workstation gains
access to the networkaccess to the networkDistributed access controlDistributed access control
• Token passingToken passingRandom access controlRandom access control
• ““Listens” for network trafficListens” for network traffic
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Network Software and Hardware
Network topologiesNetwork topologies Star networkStar network Ring networkRing network Bus networkBus network
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Network Software and Hardware
ProtocolsProtocols OSI model – open systems interconnectionOSI model – open systems interconnection EthernetEthernet TCP/IPTCP/IP
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Network Software and Hardware Connectivity hardwareConnectivity hardware
1.1. Transmission Media ConnectorsTransmission Media Connectors2.2. Network interface card (NIC)Network interface card (NIC)3.3. ModemsModems4.4. RepeatersRepeaters5.5. HubsHubs6.6. BridgesBridges7.7. MultiplexersMultiplexers8.8. RoutersRouters9.9. BroutersBrouters10.10. Channel service unitsChannel service units11.11. GatewayGateway
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