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Which of the following functions are performed by a firewall?

Which of the following functions are performed by a firewall?

Each correct answer represents a complete solution. Choose all that apply.
A . It hides vulnerable computers that are exposed to the Internet.
B . It logs traffic to and from the private network.
C . It enhances security through various methods, including packet filtering, circuit-level filtering, and application filtering.
D . It blocks unwanted traffic.

Answer: A,B,C,D

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