When using the file transfer protocol in active mode, which of the following ports is used to transfer a file?

The correct answer is A. 20. FTP uses two separate ports: port 21 for the control connection (commands and responses) and port 20 for the actual data transfer in active mode. When a client initiates an active mode FTP session, the server opens port 20 to push data to the client. Port 23 is Telnet, port 25…

Networking

Question

Options

A20
B23
C25
D115

How the community answered

(63 responses)

A
86% (54)
B
8% (5)
C
5% (3)
D
2% (1)

Explanation

FTP uses two separate ports: port 21 for the control connection (commands and responses) and port 20 for the actual data transfer in active mode. When a client initiates an active mode FTP session, the server opens port 20 to push data to the client. Port 23 is Telnet, port 25 is SMTP (email), and port 115 is SFTP (Simple File Transfer Protocol), making them all incorrect.

Topics

#FTP#active mode#port numbers#file transfer

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