No other FTP server supporting file duplication is known. WinSCP supports ProFTPD mod_copy commands SITE CPFR/ CPTO. WinSCP can open a separate shell session to duplicate the file instead. The server has to support SFTP extension copy-file (supported by ProFTPD mod_sftp for example) or copy-data ( supported by the latest beta version only, supported by OpenSSH for example). On the other hand it limits some functionality. Recursive operations with directories (deletion, permissions change), can be done with a single command ( rm, chmod, etc). Thus operations can take a long time, especially for directories with a large number of files. Recursive operations with directories (deletion, permissions change) must be performed separately for each file. WinSCP emulates text mode by converting file before transfer.
For older versions WinSCP emulates text mode by converting files before transfer. Transfer cannot be canceled without termination of session. WinSCP supports resuming only since SFTP-2 (which introduces rename command). Medium (encryption, but efficient file transfer, yet it does not allow the transfer to be interrupted). Generally fastest file transfer (no encryption and efficient file transfer), yet transfer setup is slow, so transfer of large number of small files can be slow. Generally slowest (encryption and necessity to wait for packet confirmations). The list below shows only those features which differ between the protocols, so it is not complete listing.
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