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(duì)個(gè)人計(jì)算機(jī)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(rèn)證服務(wù)器可以構(gòu)筑一種分層次通信保護(hù)結(jié)構(gòu),對(duì)試圖接入網(wǎng)絡(luò)的用戶進(jìn)行嚴(yán)格的認(rèn)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。