I think there are even more people who have never heard of the zmodem protocol, not to mention convenient tools like RZ/Sz.
Good things are not exclusive. Here is a bit of my knowledge.
The following section is copied from the help of securecrt:
Zmodem is a full-duplex File Transfer Protocol that supports fast data transfer rates and valid tive error detection. zmodem is very user friendly, allowing either the sending or refreshing party to initiate a file transfer. zmodem supports multiple file ("batch") transfers, and allows the use of wildcards when specifying filenames. zmodem also supports resuming most prior zmodem File Transfer attempts.
Rz, SZ is a command line tool for zmodem file transmission in Linux/Unix and windows.
Windows must support the zmodem Telnet/ssh client, and securecrt can be used to log on to Unix/Linux Hosts (either telnet or SSH)
O run the RZ command to receive the document. securecrt will pop up the document Selection dialog box. After selecting the document, close the dialog box and the document will be uploaded to the current directory.
O running command SZ file1 file2 is to send a document to Windows (the saved directory can be configured) is much more convenient than FTP command, and the server no longer needs to enable the FTP service
PS: Linux RZ/SZ these two gadgets install lrzsz-x.x.xx.rpm, Unix source code can be compiled by themselves, Solaris SPAC to SunFreeware download Execution Code