A user is unable to access an FTP server after installing a firewall program. Which of the following TCP ports should be opened in the firewall in order to resolve the problem?

The correct answer is D. 21. See the full explanation below for the reasoning.

Question

A user is unable to access an FTP server after installing a firewall program. Which of the following TCP ports should be opened in the firewall in order to resolve the problem?

Options

A8088
B3389
C80
D21

How the community answered

(23 responses)

A
9% (2)
B
13% (3)
C
4% (1)
D
74% (17)

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