远程访问服务
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远程访问服务(Remote Access Services，簡稱RAS)指任何可提供遠端訪問服務的軟體及硬體組合，使用戶可以存取在遠端的工具或資訊。這些內容可能放在網路上的其他裝置上。
Originally coined by Microsoft when referring to their built-in NT remote access tools, RAS was a service provided by Windows NT which allows most of the services which would be available on a network to be accessed over a modem link. The service includes support for dialup and logon, and then presents the same network interface as the normal network drivers (albeit slightly slower). It is not necessary to run Windows NT on the client - there are client versions for other Windows operating systems.
A feature built into Windows NT that enables users to log into an NT-based LAN using a modem, X.25 connection or WAN link. RAS works with several major network protocols, including TCP/IP, IPX, and NetBEUI.
To use RAS from a remote node, you need a RAS client program, which is built into most versions of Windows, or any PPP client software. For example, most remote control programs work with RAS.
Over the years, many vendors have provided both hardware and software solutions to gain remote access to various types of networked information. In fact, most modern routers include a basic RAS capability that can be enabled for any dial-up interface.
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| 本文參考素材源自「FOLDOC」，在GFDL下授權。 This article was originally based on material from the Free On-line Dictionary of Computing and is used under the GFDL. |
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