3.1 Basic Capabilities of Network Operating System (NOS):
UNIX/Linux: Unix/Linux is both an Computer Operating System as well as a Network Operating System. It consists of a kernal and a user interface called a shell. Kernel is a main program of Unix system. it controls CPU, memory, hard disk, network card, and other hardware components. Shell is an interface between user and kernel. Shell interprets your input as commands and pass them to kernel.
The following are the important features of UNIX/Linux Operating system:
Some commonly used commands in UNIX are listed below:
Netware: Netware is the first NOS to be used for PC LANs. It has multiple client support for multiple client platforms. Netware 4.x and above uses NDS for authentication. NDS is a directory service that keeps track of all of the network entities and performs authentication for them.
Macintosh: The recent of Mac OS version is based on a UNIX kernel, so essentially it is a UNIX server. In addition to Mac clients, a Mac server can support UNIX clients and Windows clients. Authentication is handheld through Kerberos and Open Directory. File and print services are handheld through AppleShare and other open protocols and utilities. Mac OS has limited application support.
Windows: Windows Server uses the same interface and, to some extent, the same software as the desktop Windows versions. Earlier versions of Windows did not support Networking. Now, ofcourse, all Windows OSes support networking. Given below are the Windows OSes that support networking:
Though the desktop Windows versions like Win9x support networking, it is limited to peer-to-peer networking. Windows 2000, and Windows2003 support client-server computing.
Windows 2003 Server is among the most advanced servers offered by Microsoft. The important features offered by Windows 2003 Server include the following:
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