网络接入伺服器（Network Access Server，NAS）[1]，是一种远程访问接入装置。它通常有以下功能：
- 鉴权：NAS与AAA伺服器联动，在用户要访问互联网并打开浏览器时弹出登录界面，只有拥有正确用户名/密码的用户才可以在登录后继续访问互联网。
参考文献
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