( ) is the name given to a “secret” access route into the system。(2014年上半年程序员综合知识真题答案与解析)
( ) is the name given to a “secret” access route into the system。(2014年上半年程序员综合知识真题答案与解析)
A、Password
B、Firewall
C、Cryptography
D、Back door
参考答案:D
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