What is middleware scripting?
Middleware scripting is scripts that help two systems communicate and dictates how they interact. An example would be a script that sends an authentication code to a users email for the user to later enter.
What is the difference between SSH and FTP and why do we use each?
FTP is essentially included in SSH because it can also be used to transfer files, however it can also do a lot more and is more secure.
With SSH you can run commands and install programs. Essentially you have full access to a computer remotely. SSH is also encrypted while FTP usually is not.