Is adfrw assigned to file permissions in Filezilla?

Question

linux

When sending files to a remote machine under Linux through Filezilla with Windows, I noticed the file permissions, which are assigned the value adfrw (on the screen). Moreover, next to different resolutions 644 and 664, the same value adfrw is assigned.
Googling resulted in RFC 3659 which doesn't mention adfrw. When googling, I came across a mention of adfrw next to flcdmpe.
Please tell me what these adfrw/flcdmpe are and what they are for.

Answer 1

These are file permissions, in RFC 3659, they appear, most likely because the ftp server does not support MSLD & MLST commands.
Mentioning this in RFC 3659