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The correct answer is B.

OBJ-1.1: Normally, port 21 is used for the FTP (File Transfer Protocol) to transfer files between computers and a remote server, but it does so over an unencrypted connection (and is therefore not secure). Therefore, it is a better idea to use port 22, which will allow a user to use SFTP (Secure FTP) or SCP (Secure Copy) to transfer a file from a computer to a remote server over an encrypted SSL/TLS tunnel.

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