Performance Measurement and control

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September 1, 2019 at 9:30 pm #544100
mayzin1707
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Dear Tr.Moffat,

Q. Which one of the following is often used to protect an intranet from unauthorized access by and external hacker?

A. Anti-virus software
B. Data encryption
C. Firewall
D. Passwords

Answer is D or C??
If the answer is C. May I know the reason.

Thanks.

May.
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