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Network Information Service
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==Successor technologies== The original NIS design was seen to have inherent limitations, especially in the areas of scalability and security, so other technologies have come to replace it. Sun introduced [[NIS+]] as part of [[Solaris (operating system)|Solaris 2]] in 1992, with the intention for it to eventually supersede NIS. NIS+ features much stronger security and authentication features, as well as a hierarchical design intended to provide greater scalability and flexibility. However, it was also more cumbersome to set up and administer, and was more difficult to integrate into an existing NIS environment than many existing users wished. [[NIS+]] was removed from Solaris 11.<ref>{{cite web |url=http://www.oracle.com/technetwork/systems/end-of-notices/eonsolaris11-392732.html |title=End of Feature Notices for Oracle Solaris 11 |date=2012-12-20|publisher=[[Oracle Corporation]]}}</ref> As a result, many users choose to remain with NIS, and over time other modern and secure distributed directory systems, most notably [[Lightweight Directory Access Protocol]] (LDAP), came to replace it. For example, <code>[[slapd]]</code> (the standalone LDAP [[Daemon (computer software)|daemon]]) generally runs as a non-[[root user]], and [[Simple Authentication and Security Layer|SASL]]-based encryption of LDAP traffic is natively supported. On large [[LAN]]s, [[Domain name system|DNS]] servers may provide better [[nameserver]] functionality than NIS or LDAP can provide, leaving just site-wide identification information for NIS master and slave systems to serve. However, some functions{{mdashb}}such as the distribution of netmask information to clients, as well as the maintenance of e-mail aliases{{mdashb}}may still be performed by NIS or LDAP. NIS maintains an [[Network File System (protocol)|NFS]] database information file as well as so called maps.
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