In most contexts, / is used to separate directory and file names in filenames, and any use of other conventions (for example, that the user might type on the command line) is converted to that form. The only exceptions might be a few cases in which the server provides a magic cookie which the client then repeats verbatim. Directory names may contain a drive letter in DOS format at the beginning, as in e:/foo.
Characters not defined by the current server codepage as defined by the server-codepage command should not be sent by the client. If the server-codepage command is not available on the server then the client should refrain from sending any characters outside the standard ISO 646 character set.