Network Information Service Plus (NIS+)
NIS+ is similar to NIS but offers more features. In addition to providing centralized administration and access to domain data, it also supports a hierarchical domain namespace that can be configured to reflect an organization's structure; NIS, however, provides only a flat domain. NIS provides no authentication, but NIS+ provides Data Encryption Standard (DES)–based authentication. In addition, whereas NIS propagates updated information in a batch mode, NIS+ propagates incremental updates immediately. Like NIS, NIS+ supports the optional use of redundant servers (referred to as replicas). These replicas provide load balancing and alternative servers in case the master NIS+ server fails.
NIS stores its ...
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