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Which of the following Port address(es) used by the FTP protocol ? I. Port 80 II. Port 21 III. Port 20…

FTP uses TCP port 21 for control and conventionally port 20 for the server's active-mode data connection. Passive-mode data connections use a separately negotiated port.

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Which of the following Port address(es) used by the FTP protocol ?
I. Port 80
II. Port 21
III. Port 20
IV. Port 18

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Answer and explanation

Correct answer C

FTP uses TCP port 21 for control and conventionally port 20 for the server's active-mode data connection. Passive-mode data connections use a separately negotiated port.

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