Explanation
Cloud environments are constantly changing and often span multiple physical locations. A cloud customer is also very unlikely to have knowledge and insight into the underlying systems architecture in a cloud environment. Both of these realities make it very difficult, if not impossible, for an organization to provide a comprehensive systems design document.

Explanation/Reference:
Explanation:
A cloud carrier is the intermediary who provides connectivity and transport of cloud services between cloud providers and cloud customers.

Explanation/Reference:
Explanation:
Regardless of which cloud-hosting model is used, the cloud provider always has sole responsibility for the physical environment.