The correct answer is: C. both scalable and secure.
The IoT-A reference model is a conceptual framework that provides a common understanding of the different components and interactions of the IoT. It is designed to be scalable and secure, and to support a wide range of IoT applications.
The IoT-A reference model consists of four layers: the perception layer, the network layer, the application layer, and the business layer. The perception layer is responsible for collecting data from sensors and devices. The network layer is responsible for transporting data between the perception layer and the application layer. The application layer is responsible for processing and analyzing data, and for providing services to users. The business layer is responsible for managing the IoT infrastructure and for providing value-added services to users.
The IoT-A reference model is designed to be scalable and secure. It is scalable in the sense that it can be used to support a wide range of IoT applications, from small-scale applications to large-scale applications. It is secure in the sense that it provides a framework for protecting data and devices from unauthorized access and malicious attacks.
The IoT-A reference model is a valuable tool for anyone who is developing or deploying IoT applications. It provides a common understanding of the different components and interactions of the IoT, and it helps to ensure that IoT applications are scalable, secure, and interoperable.
Here is a brief explanation of each option:
- Option A: scalable. The IoT-A reference model is designed to be scalable and can be used to support a wide range of IoT applications, from small-scale applications to large-scale applications.
- Option B: secure. The IoT-A reference model provides a framework for protecting data and devices from unauthorized access and malicious attacks.
- Option C: both scalable and secure. The IoT-A reference model is designed to be scalable and secure, and to support a wide range of IoT applications.
- Option D: neither scalable nor secure. The IoT-A reference model is designed to be scalable and secure.