Since pc can be easily connected to the network and get all kinds of internal information , there exists information security hidden troubles in the system . aas can establish a hierarchical communication safeguard to enforce the strict authentication on those who want to connect into the network . this action insures that only those expected users will be connected into the network and avoid the illegal entry 針對個人計算機可以很方便的接入網(wǎng)絡(luò)而獲取各種內(nèi)部資源的信息安全隱患, aas接入認證服務(wù)器可以構(gòu)筑一種分層次通信保護結(jié)構(gòu),對試圖接入網(wǎng)絡(luò)的用戶進行嚴(yán)格的認證,保證只有系統(tǒng)期望的用戶才能接入網(wǎng)絡(luò),避免非法用戶的侵入。