PDP包括的组件 a) 网络访问授权者(Network Access Authority，NAA)：在与NAR所在 的抽象层中，决定一个接入终端是否能够得到访问授权。
基于4个网页-相关网页
ControllerUsers nt AUTHORITY \ NETWORK SERVICE (the account running the default application pool in which Controller's virtual directories have write access).
ControllerUsers nt AUTHORITY \ NET WORK SERVICE(运行默认应用程序池的帐户，Controller的虚拟目录在该池中拥有写访问权)。
The network access with exceeding authority is prevented. The abuse of the network resource is avoided which is utilized to developing correlative service of the roaming subscriber.
该方法可以防止用户越权使用网络，避免造成网络资源滥用，利于漫游用户相关业务的有效开展。
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