Using FTP passive mode, after the client opens thecommand channel (port 21) to the FTP server and requests passive mode, what will be the next step? ()
- A The FTP server sends back an acknowledgment (ACK) to the client
- B The FTP server allocates a port touse for the data channel and transmit that port number to the client
- C The FTP server opens the data channel to the client using the port number indicated by the client
- D The FTP client opens the data channel to the FTP server on Port 20
- E The FTP client opens the datachannel to the FTP server on Port 21