I'm somewhat new to SharePoint administration but for the past year and a half I've been deploying new sites and digging in to some more advanced aspects of the system.
However, today I was surprised when one of my SharePoints sites that was in a stopped state in IIS continued to function. Then I tested on another site and got the same results. This made me realize I must be missing something about the SharePoint architecture and how it utilizes IIS.
A few details...
I have around 15 sites. Some are marked to require SNI, and some are not. All run on ports 80 and 443 with a redirect rule in place. The two sites I tested by stopping both require SNI.
Why is it the site can continue to load for the clients when the site is stopped in IIS? What am I missing?