How does Remote desktop work

Hi all, I'm trying to figure out a question, maybe someone can tell me a website or a book that describes in detail How does Remote desktop work? Also, I understand that the RDP software is installed on all Windows computers, or is there an exception? I would be very grateful for help!

https://en.wikipedia.org/wiki/Remote_Desktop_Protocol

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#moved

What exactly do you want to do, connect remotely? All Windows OS computers have RDP server software installed by default, allowing them to accept connection requests without issue. If you need more information, you can look here [Only registered and activated users can see links. Click Here To Register...]

to sum it up

1) You open Windows Start Menu (Win 10/11)
2) You type "rdp" and open "Remote Desktop Connection"
3) In the next window you enter the hostname or ip address of the device you want to connect to.
4) If the connection is successful a Window will open up, streaming the remote computer to your device.

Your target machine has to specifically allow rdp requests e. g. can't be blocked by firewall etc. In most IT companies rdp is bread & butter for example if you are on the go with a lightweight laptop but need to work with a heavy tool like AutoCAD.

Although I have never set it up personally I would assume that setting it up for home use is a hassle.

Teamviewer is way more straight-forward choice and completely free.

RDP also requires Windows Professional on the target machine which isn't light on the wallet.