What infrastructure model provides access to shared computing resources over a network, often the internet?

Cloud computing infrastructure model provides access to shared computing resources over a network, often the internet. The cloud computing infrastructure is a virtual infrastructure composed of hardware and software components needed to support the computing requirements of a cloud computing model.And the cloud computing model is the delivery of computing services (servers, storage, databases, networking, software, analytics and more) over the Internet . 

That is called a  (wimax)           because it  uses wireless transmissions for data communications as much as 35 miles apart.