The computer that is not connected to the Internet can be completely secure.
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This paragraph tells web administrators to adopt the idea of “layered security”.
A. 对
B. 错
The so-called “layered security” is the idea of having multiple ways of preventing an intrusion.
A. 对
B. 错
A hacker is an intruder.
A. 对
B. 错
Hackers are those who are threats to computer and network security.
A. 对
B. 错
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