You'll learn how to set up and configure a Remote authentication Dial-In user Service server (RADIUS) on a Linux system to perform authentication, authorization, and accounting (AAA) for users.

您将学习如何在Linux系统上建立和配置一个Remote Authentication Dial - in User Service服务器(RADIUS)，以执行对用户的验证、授权和记帐(AAA)。

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You will never lose control of your dial-up or network connection or any other part of your system.

您永远不会失去对您的拨号程序或网络连接或其他任何系统设置上的控制权。

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When the system makes sure they are abnormal, it will dial out the setting telephone saved in EEPROM, waiting for the other end to pick up phone and then will send the tone alarm out.

当活动出现异常时，系统拨打预先存贮在EEPROM中的电话号码，待对方接通后，发送语音报警。

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It is not uncommon to dial up to 50 times before even getting through to the queuing system.

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But there were a couple of critical differences in that deal: For one, with its millions of paying dial-up customers, AOL didn't need to build out an incredibly expensive broadband distribution system.

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Earlier this year it launched a network adapter for its PlayStation 2 gaming system that lets customers play against each other over the Internet using either a dial-up modem or a broadband connection.

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