1. Network Fundamentals Summer 1998 Thane B. Terrill

2. July 1998 Introduction Networks are like cars in that they are full of simple things that once put together become very complicated. The secrete to understanding a network is to understand the overall relationships between the components. Therefore, when a problem occurs, you can isolate the problem to one area of the network.

3. July 1998 2.1 File Servers (p. 157) 2.1.1 A shared resource 2.1.2 Common hard disk 2.1.3 Centralized security 2.1.3.1 User rights 2.1.3.2 Data protection 2.1.4 Serving files 2.1.5 Hardware characteristics 2.1.6 Huge storage area 2.1.7 Fast I/O (input/output)

4. July 1998 2.2 Application servers 2.2.1 Shared applications 2.2.2 For "mission-critical" jobs 2.2.3 Hardware characteristics 2.2.3.1 Fast processors 2.2.3.2 Large amounts of RAM 2.2.3.3 Large storage area

5. July 1998 2.3 PCs and NCs (p. 113) 2.3.1 Hardware characteristics 2.3.2 Superior video and sound 2.3.3 Ergonomics

6. July 1998 2.4 Network Computers 2.4.1 Moves processing to server 2.4.2 Computer as appliance 2.4.3 X-windows 2.4.4 Java 2.4.5 WinTerm (Win Frame, Citrix, Hydra) 2.4.6 Dumb terminal replacement

7. July 1998 2.5 Network operating systems 2.5.1 NetWare 2.5.2 Windows NT 2.5.3 Unix 2.5.4 Lantastic and other peer-to-peer systems

8. July 1998 2.5.5 OSI network model 4 Physical -- vocal cords 4 Datalink -- moving air 4 Network -- creating sounds (Do, Ra, Me) 4 Transport -- organizing sounds into words, etc. 4 Application -- the musical score Physical (hardware) Datalink (packets) Network (datagrams) Transport (byte-stream) Application (data)

9. July 1998 2.6 Novell NetWare 2.6.1 Market Leader -- especially in large organizations 2.6.2 Fastest and most secure system 2.6.3 Excellent directory service 2.6.4 Not good as an application server

10. July 1998 2.7 Windows NT (p. 83) 2.7.1 Fastest growing system for small sites 2.7.2 Considered easiest to administer 2.7.3 Good as an application server 2.7.4 Weak network security and poor directory services 2.7.5 NT Workstation is an inexpensive server 2.7.6 NT comes bundles with many programs, like a web server

11. July 1998 2.8 Unix 2.8.1 Many versions of Unix exist 2.8.2 Powerful 2.8.3 Runs on many computer platforms 2.8.4 Scalable 2.8.5 Suitable for mission-critical jobs 2.8.6 Flexible commands and utilities 2.8.7 Difficult to use 2.8.8 Almost a requirement in a university environment

12. July 1998 2.9 Lantastic 2.9.1 Peer-to-peer 2.9.2 Each computer can be a "server" 2.9.3 Good for very small networks 2.9.4 Mostly used to share printers 2.9.5 Frequently used in small educational settings 2.9.6 Easy to use and administer 2.9.7 Can be integrated with other server systems