Network Information System (NIS)

Definition of Network Information System (NIS) in The Network Encyclopedia.

What is NIS (Network Information System)?

nis - A client/server directory services application developed by Sun Microsystems for UNIX. Network Information System (NIS) acts as a kind of “yellow pages” for locating resources on a TCP/IP internetwork, enabling applications or users to locate and access files and applications anywhere in the network using only a single username and password.

How It Works

NIS uses remote procedure calls (RPCs) for communication between clients and servers. NIS client programs access NIS servers to locate resources and authenticate resource access.

A newer version called NIS+ includes additional security features. NIS is often used with the Network File System (NFS).