3/5/2002e-business and Information Systems1 Computer Networking Computer System Computer Hardware Computer Software Computer Networking.

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Presentation transcript:

3/5/2002e-business and Information Systems1 Computer Networking Computer System Computer Hardware Computer Software Computer Networking

3/5/2002e-business and Information Systems2 Computer System n Hardware n Software

3/5/2002e-business and Information Systems3 Computer Hardware n Input devices n Output devices n System unit – CPU – Memory (RAM) n Storage n Networking devices

3/5/2002e-business and Information Systems4 Computer Software n System Program – Operating System – Utility program – Maintained by SA n Application Program – Users

3/5/2002e-business and Information Systems5 Computer Networks n Local Area Network (LAN) n Intranet n Internet n Extranet

3/5/2002e-business and Information Systems6 Local Area Network n Two or more computers n Connected – cable – hub/switch n Small physical area – home – office – small group of buildings n school n airport

3/5/2002e-business and Information Systems7 Networking Devices n cable n hub n switch n network interface card (NIC) n wireless – bluetooth – WiFi – WiMax

3/5/2002e-business and Information Systems8 Cables n Coaxial cable n Ethernet cable

3/5/2002e-business and Information Systems9 Coaxial Cable n cable TV

3/5/2002e-business and Information Systems10 Ethernet Cable n 4 twisted pairs n 8 pins plug

3/5/2002e-business and Information Systems11 Hub/Switch n Ports

3/5/2002e-business and Information Systems12 Computer Networking Topologies n Bus topology n Ring topology n Star topology n Tree topology

3/5/2002e-business and Information Systems13 Bus Topology n common backbone n interface connector n broadcast message

3/5/2002e-business and Information Systems14 Ring Topology n exactly two neighbors n same direction

3/5/2002e-business and Information Systems15 Star Topology n central connection n hub/switch

3/5/2002e-business and Information Systems16 Tree Topology n Bus topology n Star topology

3/5/2002e-business and Information Systems17 Internetworking n Two or more networks – heterogeneous – different configurations n router – two or more NIC – gateways

3/5/2002e-business and Information Systems18 Extranet n private network n internet protocol n Virtual Private Network (VPN)