FTP(part 8)- FTP preparation subcommands

FTP environment preparation commands:

ASCII	Use the ASCII subcommand to direct FTP to translate outgoing files into ASCII before sending them to the other host, and to convert incoming files from ASCII to the file system code page before storing them. There are no parameters for this subcommand.
BINARY	Use the image transfer type to transfer files between client and server without any translation of the file data. When using the image transfer type, data is sent as contiguous bits packed into 8-bit bytes.  There are no parameters for this subcommand.
BLOCK	Use the BLock subcommand to set the data transfer mode to block mode. This is equivalent to specifying the MOde B subcommand.
MODE	Use the MOde subcommand to define how bits of data are to be transmitted. >>-MOde--+-B-+-------------------------------------------------><          +-C-+           '-S-'  B : Sets the block mode. In block mode, data is transmitted as a series of data blocks, preceded by one or more header bytes. Block mode preserves the logical record boundaries of the data set or file. When MOde is set to B, the data transfer type must be EBCDIC. Specifying MOde B is equivalent to specifying the BLock subcommand. C :Sets the compressed mode. In compressed mode, data is transmitted as a series of data blocks, preceded by one or more header bytes. Compressed mode preserves the logical record boundaries of the data set or file. In compressed mode, data is transmitted without repetitive characters and blanks. When MOde is set to C, the data transfer type must be EBCDIC. Specifying MOde C is equivalent to specifying the COMpress subcommand. S: Sets the stream mode. In stream mode, data is transmitted as a stream of bytes. Any data transfer type can be used with stream mode. Stream mode is efficient because data block information is not transferred Specifying MOde S is equivalent to specifying the STREam subcommand.
EBCDIC	The EBcdic subcommand enables you to change the data transfer type to EBCDIC. There are no parameters for this subcommand.
COMPRESS	Use the COMpress subcommand to set the data transfer mode to compressed mode. This is equivalent to specifying the MOde C subcommand. There are no parameters for this subcommand.
FILE	Use the FIle subcommand to set the file structure to File. This is equivalent to specifying the STRucture F subcommand. There are no parameters for this subcommand.
RECORD	Use the RECord subcommand to set the file structure to record. This is equivalent to specifying the STRucture R subcommand. There are no parameters for this subcommand.
Structure	Use the STRucture subcommand to set the file structure. >>-STRucture--+-File---+---------------------------------------><               '-Record-'  File: Sets the file structure to File. When the STRucture value is File, the file is sent as a continuous sequence of data bytes. Record: Sets the file structure to Record. When the STRucture value is Record, the file is sent as a series of records.
Stream	Use the STREam subcommand to set the data transfer mode to stream mode. This is equivalent to specifying the MOde S subcommand. There are no parameters for this subcommand.
PROMPT	Use the PROMpt subcommand to toggle interactive prompting for MDelete, MGet, and MPut commands. Prompting is the default action unless the FTP session was started with the -i option, which turns off interactive prompting

NOte : All the information about FTP and the syntax diagrams are taken from the site http://publib.boulder.ibm.com.

Things are put here in simplified words and Many commands that are not used normally are omitted.

Refer the website http://publib.boulder.ibm.com. in case you need more details.