It is essential to consider the possible access paths to every layer of a system, and also to consider how authorization integrates with other security aspects, such as network level protection.

务必考虑系统的每个层次的可能访问路径，同时还要考虑授权如何与其他安全功能(如网络级别的保护)集成。

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Considering the convergence of WLAN over fiber system and PON access network, PCF protocol is proved to be the most suitable transmission mechanism in the MAC layer.

在考虑光载WLAN系统与PON接入网络融合情况下，综合分析得出P CF传输机制是最适合光载WLAN系统的MAC层协议。

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