If you are looking at Microsoft Infrastructure as a service from a Service provider perspective or Enterprise the following is a must read! https://curah.microsoft.com/257301/what-are-the-technological-underpinnings-of-a-microsoft-infrastructure-as-a-service-infrastructure Tom Shinder is describing in depth all the different technology underpinnings. You will find different articles that provides you with handy links to content that will help you understand Microsoft...