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port number for ftp
port number for ftp protocol
port number for ftp data
port number for ftp control
port number for ftp data transfer
secure ftp port number
ftp port number 20 and 21
ftp port number and protocol
what is ftp port number
port number for ftp, port number for ftp protocol, port number for ftp data, port number for ftp control, port number for ftp data transfer, secure ftp port number, ftp port number 20 and 21, ftp port number and protocol, what is ftp port number
