题目内容
数字签名是为了满足电子商务对网上安全交易的要求，这种要求是（）
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You are the network administrator for your company. All servers run Windows Server 2003. You configure the Routing and Remote Access service on a server named Server2. Server2 is connected to a modem pool and supports eight simultaneous inbound connections. You instruct remote users to dial in to Server2 from their home computers.The company’s written business policy states that the only client computer operating systems that should be supported for dial-up access are Windows 95， Windows 98， Windows 2000 Professional， and Windows XP Professional.You need to configure the remote access policy to support the most secure authentication methods possible. You want to enable only the necessary authentication methods based on the supported client computers that will be connecting. Which authentication method or methods should you enable？（）
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