單項選擇題

What mechanism does a system use to compare the security labels of a subject and an object?系統(tǒng)使用什么機(jī)制來比較的主體和客體的安全標(biāo)識?()

A. Security Module.安全模塊
B. Validation Module.驗證模塊
C. Clearance Check.聲明檢查
D. Reference Monitor.引用監(jiān)視器

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