大多数应用程序需要解决用户的验证和授权问题。
Most applications need to address the issues of user authentication and authorization.
它允许网络访问服务器(NAS)执行对用户的验证、授权和记帐。
It allows a network access server (NAS) to perform authentication, authorization, and accounting for users.
当然调查者必须小心避免基于自己对事实的解释做出假设，而不经过用户的验证。
Interviewers must be careful, however, to avoid assumptions based on their own interpretation of the facts without verifying these assumptions with users.
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