Commands consist of a command word, which in some cases may be followed by a parameter. Commands with parameters must separate the parameters from each other and from the command by one or more space or tab characters. Command lines must be complete with all required parameters, and may not contain more than one command.
Commands and command parameters are not case sensitive. That is, a command or parameter word may be upper case, lower case, or any mixture of upper and lower case.
Each command line must be terminated by a CR-LF (Carriage Return - Line Feed) pair.
Command lines shall not exceed 512 characters in length, counting all characters including spaces, separators, punctuation, and the trailing CR-LF (thus there are 510 characters maximum allowed for the command and its parameters). There is no provision for continuation command lines.