1. 3/5/2002e-business and Information Systems1 Computer Networking Computer System Computer Hardware Computer Software Computer Networking

2. 3/5/2002e-business and Information Systems2 Computer System n Hardware n Software

3. 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

4. 3/5/2002e-business and Information Systems4 Computer Software n System Program – Operating System – Utility program – Maintained by SA n Application Program – Users

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

6. 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

7. 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

8. 3/5/2002e-business and Information Systems8 Cables n Coaxial cable n Ethernet cable

9. 3/5/2002e-business and Information Systems9 Coaxial Cable n cable TV

10. 3/5/2002e-business and Information Systems10 Ethernet Cable n 4 twisted pairs n 8 pins plug

11. 3/5/2002e-business and Information Systems11 Hub/Switch n Ports

12. 3/5/2002e-business and Information Systems12 Computer Networking Topologies n Bus topology n Ring topology n Star topology n Tree topology

13. 3/5/2002e-business and Information Systems13 Bus Topology n common backbone n interface connector n broadcast message

14. 3/5/2002e-business and Information Systems14 Ring Topology n exactly two neighbors n same direction

15. 3/5/2002e-business and Information Systems15 Star Topology n central connection n hub/switch

16. 3/5/2002e-business and Information Systems16 Tree Topology n Bus topology n Star topology

17. 3/5/2002e-business and Information Systems17 Internetworking n Two or more networks – heterogeneous – different configurations n router – two or more NIC – gateways

18. 3/5/2002e-business and Information Systems18 Extranet n private network n internet protocol n Virtual Private Network (VPN)