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

时间:2022-11-07 03:24:54 所属题库:CCIE(350-018)题库

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