The correct answer is: D. All of the mentioned.
Each different type of cloud service delivery model creates a security boundary. This means that the customer is responsible for the security of the data and applications that reside above the security boundary, while the cloud provider is responsible for the security of the data and applications that reside below the security boundary.
Any security mechanism below the security boundary must be built into the system by the cloud provider. This includes things like firewalls, intrusion detection systems, and data encryption.
Any security mechanism above the security boundary must be maintained by the customer. This includes things like user authentication, access control, and data backup.
It is important to understand the security implications of each different type of cloud service delivery model in order to choose the right model for your needs.
Here is a more detailed explanation of each option:
- Option A: Each different type of cloud service delivery model creates a security boundary. This is true. The security boundary is the point at which the responsibility for security shifts from the cloud provider to the customer. For example, in a Infrastructure as a Service (IaaS) model, the customer is responsible for the security of the operating system and applications that they install on the cloud provider’s infrastructure. In a Platform as a Service (PaaS) model, the cloud provider is responsible for the security of the operating system and platform, but the customer is responsible for the security of the applications that they develop and deploy on the platform. In a Software as a Service (SaaS) model, the cloud provider is responsible for the security of the software and the infrastructure on which it runs.
- Option B: Any security mechanism below the security boundary must be built into the system by the cloud provider. This is true. The cloud provider is responsible for the security of the infrastructure, including the operating system, hypervisor, and networking components. The cloud provider must also build in security features such as firewalls, intrusion detection systems, and data encryption.
- Option C: Any security mechanism above the security boundary must be maintained by the customer. This is true. The customer is responsible for the security of the applications and data that they store in the cloud. The customer must implement security features such as user authentication, access control, and data backup.
- Option D: All of the mentioned. This is the correct answer. Each different type of cloud service delivery model creates a security boundary, and the cloud provider is responsible for the security of the infrastructure below the security boundary, while the customer is responsible for the security of the applications and data above the security boundary.