The FTP specification specifies many parameters which may affect a file transfer. The type may be one of ‘ascii’, ‘image’ (binary), ‘ebcdic’, and ‘local’ byte size (for PDP-10's and PDP-20's mostly). ftp supports the ‘ascii’ and ‘image’ types of file transfer, plus local byte size 8 for tenex mode transfers.
ftp supports only the default values for the remaining file
transfer parameters: mode
, form
, and struct
.