Answer Posted / vishal
NIS (Network Information System) is a network naming and
administration system for smaller networks that was
developed by Sun Micro systems. NIS is a later version that
provides additional security and other facilities. Using
NIS, each host client or server computer in the system has
knowledge about the entire system. A user at any host can
get access to files or applications on any host in the
network with a single user identification and password. NIS
is similar to the Internet's domain name system (DNS) but
somewhat simpler and designed for a smaller network. It's
intended for use on local area networks.
NIS uses the client/server model and the Remote Procedure
Call (RPC) interface for communication between hosts. NIS
consists of a server, a library of client programs, and some
administrative tools. NIS is often used with the Network
File System (NFS). NIS is a Unix-based program.
Although Sun and others offer proprietary versions, most NIS
code has been released into the public domain and there are
freeware versions available. NIS was originally called
Yellow Pages but because someone already had a trademark by
that name, it was changed to Network Information System. It
is still sometimes referred to by the initials: "YP".
Sun offers NIS+ together with its NFS product as a solution
for Windows PC networks as well as for its own workstation
networks
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