1. Chapter 5 Network Computing

2. Agenda Functions Feasibility Analysis

3. Network Functions Discovery Communication Collaboration

4. Discovery Internet, Web –Software agents, intelligent agents –Data warehouse and data mining Characteristics –Open –Resourceful –Efficient –Dynamic

5. Communication Internet, Intranet, Extranet Real-time, no distance Voice, data, video

6. Collaboration Groupware, Group decision support systems, (GDSS), Intranet, Extranet –Workflow systems: administrative, purchasing, production, etc. –Screen sharing –Productivity, quality, timely

7. Agenda Functions Feasibility Analysis

8. Enterprise Networking Goals Connectivity Portability Interoperability Scalability Others?

9. Network Feasibility Technology –Hardware –Media –Software –Protocols Operation –Horizontal, vertical, both –Culture, level of computing (individual, dept, etc.) Legal – International, interstate Cost/benefit Corporate objectives

10. Agenda Functions Feasibility Analysis

11. Network Analysis Open system interconnection (OSI) Type Topology Architecture Transmission characteristic Protocol Interface Media

12. Network Analysis Lines Carrier Service Security Code Signal

13. Open system interconnection (OSI) Physical layer Data link layer Network layer Transport layer Session layer Presentation layer Application layer

14. Network Types Voice or data –Private branch exchange (PBX) –Centrex LAN, MAN, WAN Enterprise –Internet –Intranet –Extranet Public, private

15. Network Types Valued added –Packet switching –Frame relay –Asynchronous transfer mode (ATM) –Integrated services digital network (ISDN) –Digital subscriber line (DSL) –Fiber distributed data interface Virtual private network (VPN) Backbone

16. Network Types Wireless –Cellular radio technology –Mobile computing –Personal communication system –Personal digital assistance

17. Network Topologies Token ring Bus Star Hierarchical Web Hybrid

18. Network Architecture Client/server Peer-to-peer

19. Transmission characteristics Speed –Bits per second (bps) –Baud rate (Hertz) Direction –Simplex –Half-duplex –Full-duplex Mode –Asynchronous –Synchronous Accuracy –Horizontal –Vertical –Cyclic redundancy checking

20. Protocols Definition –Rules & procedures for transmission Protocol types –Token passing –Carrier sense multiple access/collision detection –Transmission control protocol/internet protocol (TCP/IP) –Telnet –HTTP

21. Interface Transmission interfaces –Parallel data transfer –Serial data transfer –Universal asynchronous receiver/transmitter Network interfaces –Interface card –Routers –Bridges –Gateways

22. Interface Modem Multiplexer –Frequency division, time division, statistical time division, wavelength division Front-end processor Concentrator

23. Network Media Cable media –Fiber optics –Coaxial cable –Twisted-pair wire –Shield twisted-pair wire Wireless –Microwave –Radio –Infrared –Satellite

24. Network Lines T1, T2, T3, T4, T5 ISDN DSL Wireless

25. Network Carriers International Long distance Local Wireless Internet service provider

26. Network Services Types –In-house –Outsource Services –Data –Voice –Video –Wireless

27. Security Transmission –Hardware –Software Personnel Procedure Inventory Physical & Logical

28. Others Codes –ASCII –EBCDIC –Unicode Error corrections –ACK: acknowledge –NAK: negative acknowledge Impact –Health, job, organization, social Issues –Ethics, privacy, free speech, copy right, management

29. Points to Remember Functions Feasibility Analysis

30. Discussion Questions Why does an organization need a reliable network? What are the general selection criteria for a network? What kind networks are useful to an university such as CSUS? What kind networks are needed by a company such as Intel?

31. Discussion Questions Design a network system for a university in terms of the following items: –Types –Topologies –Media –Lines –Carrier –Services –Security –Health –Privacy

32. Assignment Review chapter technology guides 1-2 & chapters 1- 5 Read chapter technology guide 4 Group assignment 1 due date: 10/2/01 Research paper