题目内容

Symmetric key encryption is also known as:

A. public key encryption.
B. secret key encryption.
C. PGP.
D. PKI.

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Access VPN
B. Intranet VPN
C. Extranet VPN
D. Internet VPN

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Access VPN
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D. Internet VPN

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A. VPN.
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C. IDS.
D. Intranet.

All of the following are examples of malicious code except:

A. viruses.
B. bots.
C. worms.
D. sniffers.