Which of the following is NOT a foundation layer in cloud security?

In cloud security, the foundational layers typically encompass Computing, Storage, and Network, which form the essential building blocks for deploying applications and services in the cloud. Each of these layers plays a critical role in providing security mechanisms that protect against unauthorized access, data breaches, and other vulnerabilities.

Computing involves the processing power and resources allocated to run applications. Storage refers to the secure management of data, ensuring that information is stored safely and is accessible only to authorized users. The Network layer focuses on the transmission of data across secure connections, utilizing firewalls and encryption to safeguard against interception and attacks.

The Database layer, while crucial for managing and storing structured data, is generally considered an application-specific layer rather than a foundational layer of cloud security. It can be thought of as a higher-level abstraction built on top of the foundational layers. Thus, the Database layer is not categorized as one of the core pillars of cloud security, which primarily concern infrastructure and fundamental service models like Computing, Storage, and Network.