Which port is used for FTPS data (FTP over SSL data channel)?

Which port is used for FTPS data (FTP over SSL data channel)?

• A. 990
• B. 989
• C. 21
• D. 20

Answer: (B)

FTPS data is the TLS-protected data connection used alongside the control channel. In implicit FTPS, TLS starts immediately on connection, and the well-known ports are split: 990 for the secure control channel and 989 for the secure data channel. This dedicated data port helps firewalls recognize and allow the encrypted data path separate from the control messages. The other ports listed correspond to plain FTP (or the control channel in other FTPS modes) and are not the TLS-secured data channel. So, the port used for FTPS data is 989.

FTPS data is the TLS-protected data connection used alongside the control channel. In implicit FTPS, TLS starts immediately on connection, and the well-known ports are split: 990 for the secure control channel and 989 for the secure data channel. This dedicated data port helps firewalls recognize and allow the encrypted data path separate from the control messages. The other ports listed correspond to plain FTP (or the control channel in other FTPS modes) and are not the TLS-secured data channel. So, the port used for FTPS data is 989.