Network access server: Difference between revisions

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{{redirect-distinguish|NAS server|Network-attached storage}}

{{Unreferencedmore citations|date=October 20092022}}

A '''network access server''' ('''NAS''') is a single point of access to a remote resource.

A '''network access server''' ('''NAS''') is a group of components that provides remote users with a point of access to a network.<ref>{{Cite book |last=Clark |first=Martin P. |url=https://books.google.com/books?id=HccWEdLdacwC&pg=PA542 |title=Data Networks, IP and the Internet: Protocols, Design and Operation |date=2003-05-07 |publisher=[[John Wiley & Sons]] |isbn=978-0-470-84856-2 |language=en |page=542}}</ref><ref>{{Cite book |last=Held |first=Gilbert |url=https://books.google.com/books?id=06uBL8vGpoIC&pg=PA205 |title=Network Design: Principles and Applications |date=2000-05-31 |publisher=[[CRC Press]] |isbn=978-1-4200-9375-9 |language=en |page=205}}</ref>

==Overview==

A NAS concentrates dial-in and [[dial-out]] user communications. An access server may have a mixture of analog and digital interfaces and support hundreds of simultaneous users. A NAS consists of a [[communications processor]] that connects asynchronous devices to a [[LAN]] or [[Wide area network|WAN]] through network and [[terminal emulation]] software. It performs both synchronous and asynchronous routing of supported protocols.

The NAS is meant to act as a [[Gateway (telecommunications)|gateway]] to guard access to a protected resource. This can be anything from a [[telephone]] [[Telecommunications network|network]], to [[computer printer|printers]], to the [[Internet]]. A [[Client (computing)|client]] connects to the NAS. The NAS then connects to another resource asking whether the client's supplied [[credentials]] are valid. Based on that answer the NAS then allows or disallows access to the protected resource.

==Examples==

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==External links==

* {{Sum RFC|2881|ref=yes}}

* RFC 2881, Network Access Server Requirements Next Generation (NASREQNG)

==References==

{{reflist}}

{{DEFAULTSORT:Network Access Server}}

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[[Category:Telephony]]

[[Category:Telecommunications infrastructure]]

{{Compu-network-stub}}