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Solaris Naming Service Switch

With the release of the Solaris 2 operating system, Sun introduced a new naming service called NIS+ and an infrastructure for managing the coexistence of multiple naming services. With NIS and DNS already widely deployed, and NIS+ added to the mix, some mechanism for easy interoperability was required. The DNS forwarding mechanism and "+" notation used in NIS maps were not easily extensible to new naming services like NIS+.

To support the switch, Sun programmers developed a new Application

Programming Interface (API) that system utilities and other applications could use instead of talking directly to the naming service. Programs written to this API do not need to know the implementation details of the naming service they are accessing. The switch also gives the system administrator the flexibility to choose which naming services are consulted and in which order.

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