Representation Type (TYPE) - KB Article #1483Related Articles --
The TYPE command is issued to inform the server of the type of data that is being transferred by the client. Most modern Windows FTP clients deal only with type "A" (ASCII) and type "I" (image/binary).
Text data is usually transferred as type ASCII so that the server knows to convert the data according to its local storage specifications (relevant when transferring across platforms such as from a Windows client to a Linux server or vice versa). Auto-ASCII is a commonly supported FTP client feature that automatically manages the changing of the representation type based upon the extension of the file the client is transferring.