The basic purpose of a network operating system or NOS is that it controls the accesses of files form multiple users. It is used to run the computers that are to act as servers so that they can carry out all the functions for the network. It supports the hardware and also ensures the security by authentication procedures while logging in, restrictions as to who can and can’t access the system and the authorization to access to various locations in the system. It also provides directory services, replication, storage, printing and remote access.
