In FTP, the well-known port ____ is used for the control connection and the well-known port
________ for the data connection
A. 21; 22
B. 21; 20
C. 20; 21
D. none of the above
________ for the data connection
A. 21; 22
B. 21; 20
C. 20; 21
D. none of the above