How to find the type of webserver being configured for use with ColdFusion

Hello,

Where can I check to see the type of server that ColdFusion is configured to run currently? I have an existing installation of CF 9.0.1, which I will be removing and installing CF 9.0.2. During instalation of 9.0.2, I would need to specify the server to be used - ColdFusion server / Apache/ IIS etc. My question is, where should I see in the existing CF 9.0.1 to understand the server that is currently being used.

Thanks!