I have read an answer to the question : Which tools and technologies are used to build the Stack Exchange Network?. It is mentioned that
IIS 8.0 is used as a WebServer.
In IIS, If one wants to set up subdomains, one will have to create a new website with the subdomain.
How has StackExchange addressed this issue as they have so many subdomains? Have they created these many websites using IIS like this: