I have just started the Mac Server Essentials certification course and I'm stuck at chapter 1!

I have a MacBook Pro, a Mac mini server and a WiFi router as a switch between the two. I don't have it connected to my home network yet because I will be going through a lot of different exercises playing with services, installing/reinstalling etc.

So how do I do a clean reinstall over an existing install of the server OS if I don't have a separate display and keyboard. Every remote solution I can find first involves booting the mini from an external optical or USB drive which requires a keyboard and display attached to the mini.

In reality I could attach them, but I'm trying to learn how to do it in a real life situation where it might not be possible.

Am I missing something?