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Understanding Network Operating Systems: Functions, Features, and Licensing

This chapter delves into the roles of Operating Systems (OS) and Network Operating Systems (NOS) in managing computer resources and local area networks (LANs). It covers key NOS types, including Novell Netware, Windows 2000, Linux, and Unix, and highlights their functionalities and features. Additionally, the text discusses network utility software, the importance of proper network support devices, and the various software licensing agreements essential for legal software use. Learn how these components work together to maintain effective network operations.

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Understanding Network Operating Systems: Functions, Features, and Licensing

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  1. Chapter 9LAN Software and Support Systems

  2. Topics • Main functions of OSs and NOSs • Compare various NOSs • Software licenses • Network utility software • Support devices

  3. Introduction • Proper support of a local area network requires hardware, software, and miscellaneous support devices. • A network operating system is the most important software component. • Application programs are also required to support users on a LAN. • Support devices such as hubs, switches, routers, servers, modems, power supplies, and more are also necessary.

  4. Operating Systems (OS) • What is OS? • A software that manages other application programs and resources in a computer system • What can an OS do?

  5. Network Operating Systems (NOS) • A network operating system is a large, complex program that manages the resources common on most local area networks. • Besides performing standard operating system functions, a network operating system is called upon for additional functions, such as …

  6. Current NOSs • Novell Netware • Windows NT/2000/XP • Linux • Unix

  7. Novell Netware • Version 4 - Single network login, NDS database. • Version 5 - IP protocol instead of IPX/SPX protocols. • Version 6 • Any client anywhere on the Internet can print and use storage services from a NetWare 6 server without loading a single byte of Novell’s Client32 software • Powerful Internet printing services (iPrint) – GUI interface, automatic driver installation • iFolder – Very effective background application powered by Apache Web Server to “equalize” the documents in each system’s My Documents folder with an identical set on the server. • Volumes can hold 8 terabytes of data in up to 8 trillion files and can keep 1 million files open concurrently.

  8. Novell NDS (NetWare Directory Services) • A database that maintains information on, and access to, every resource on the network • A hierarchical tree structure that represents the layout of the organization. • Tree structure is composed of organizational units which are composed of further objects, and leaf objects which are not composed of further objects.

  9. Windows 2000 • Built on top of NT technology • Improved market share (>50%). • Specific versions of 2000 designed to support wide variety of system types: • Windows 2000 Professional - replaces NT Workstation • Windows 2000 Server - replaces Windows NT Server • Windows 2000 Advanced Server – supports up to 8 processors and 8GB RAM • Windows 2000 Datacenter Server - supports up to 32 processors and 64GB RAM

  10. Windows 2000 • Biggest change from NT: Active Directory • The AD is the central repository for all objects that make up the enterprise: domains, organizational units, users, groups, computers, printers, etc. • Implemented as a LDAP server • See details from http://www.microsoft.com/windows2000/server/evaluation/features/adlist.asp

  11. Unix • Older but very popular multitasking operating system capable of supporting network operations. • First operating system written in the language C. • Very stable system capable of supporting large operations. • Very Secure • Mostly command-driven, lack of GUI interface • Numerous versions available from different vendors.

  12. Linux • Operating system based on the principles of Unix • Prons • Cons

  13. Network Software • In order to support a network operating system, may also need:

  14. Utilities • Anti-virus software • Backup software • Crash protection software • Remote access software • Uninstall software

  15. Internet Server Software • Software necessary to support the server side of Internet connections. • Retrieves web pages and other documents when asked to by a client workstation. • Can interface with a database program allowing users to store and retrieve data via the Internet. • Popular web server software • Apache, TomCat, JBoss, BEA WebLogic

  16. Programming Tools • Software environments that allow programmers to create programs. • Includes software tools such as compilers and interpreters. • Software also allows individuals to edit, debug and test programs. • E.g. C/C++, Java, COBOL, Perl, VB, .Net, etc.

  17. Applications • Software programs that allow a user to perform common computer-based functions: • Database software • Desktop publishing software • Office suites, which integrate a collection of office productivity tools • Standalone spreadsheet, word processing, and presentation software

  18. Virtually every commercial software program comes with a specific license agreement. Licensing conditions: Software installation and use Network installation Back-up copies Decompilation Typical forms: Single user single station license Single user multiple station license Interactive user license Network server license Site license Corporate license Software Licensing Agreements

  19. LAN Support Devices • Other devices necessary for the proper support of a LAN: • Uninterruptable power supplies (UPS) • Tape drives • Printers • Media converters • Workstations (including thin client workstations)

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