Which ports are used for FTP (File Transfer Protocol) data transfers?

FTP (File Transfer Protocol) utilizes two primary ports for its operations: port 21 and port 20. Port 21 is used for sending commands between the client and the server, effectively controlling the connection and initiating data transfers. On the other hand, port 20 is typically used for the actual transmission of the data being transferred.

In the context of typical FTP operations, the connection initiates at port 21 where commands like login and request for file transfer occur, and once the server acknowledges this, the transfer of files happens over the data connection established through port 20. This dual-port use ensures that the command and data channels are separated, enhancing the overall functionality and reliability of the file transfer process.

Other options mentioned do not correspond to the ports used by FTP. For instance, ports 25 and 110 are associated with email protocols (SMTP and POP3, respectively), while ports 22 and 80 are linked to secure shell (SSH) or secure copy (SCP) and HTTP, respectively. Finally, ports 443 and 8080 are used for HTTPS and alternative web traffic, but they do not pertain to FTP. Therefore, the selection of ports 20 and 21 is accurate and reflects the standard protocol established