Though FTP is a straightforward facility to transfer files through the internet easily, without much fuss it is dependent on several factors that makes the process possible. First, you need a client software that can be installed for uploading and downloading, allowing your desktop to take on the same plane as the server that is handling the file distribution. The said “SERVER” may be a simple desktop too but is the so-called traffic light which tells clients, where the files are coming from and who the packets of data are for.
The server needs a server-side software that allows it to understand the file requests made by the clients and also allows them to understand each other, making the whole thing transparent. As said, the server can be a simple desktop that isn’t even running a GUI interface system but can be a bare bone system running software that allows everything to happen. Some systems like the much famed Pirate Bay even ran on mobile computers, allowing them to elude authorities who were after them all these years.