what is the diffence between WAS and IIS?

iis, was

Solution

WAS is a new feature of IIS, that allows all the features of the Windows Communication Framework stack, like non-HTTP channels and other stuff. IIS is the web server that hosts the services that are activated via WAS.

Check out this document for details.

Problem

Is WAS distinct from IIS? How is WAS better than IIS?

Original source