Explanation/Reference:
Explanation:
With multiple tenants within the same hosting environment, any failure to properly classify data may lead to potential exposure to other customers and applications within the same environment.

Explanation
Reservations ensure that a minimum level of resources will always be available to a cloud customer for them to start and operate their services. In the event of a DoS attack against one customer, they can guarantee that the other customers will still be able to operate.

Federation is not a component of access control. Instead, it is used to allow users possessing credentials from other authorities and systems to access services outside of their domain. This allows for access and trust without the need to create additional, local credentials. Access control encompasses not only the key concepts of authorization and authentication, but also accounting. Accounting consists of collecting and maintaining logs for both authentication and authorization for operational and regulatory requirements.

Explanation
The zeroing of data--or the writing of null values or arbitrary data to ensure deletion has been fully completed--is officially referred to as overwriting. Nullification, deleting, and blanking are provided as distractor terms.