What is the primary purpose of Azure Front Door?

Azure Front Door serves as a global entry point for applications, offering a scalable and secure way to manage traffic across various services. Its primary purpose is to optimize application performance, ensure reliability, and provide security features at the edge.

By utilizing Azure Front Door, businesses can enhance their web applications' responsiveness through features like dynamic site acceleration and global load balancing. This capability enables the distribution of user requests to the nearest available resources, minimizing latency and improving user experience. Additionally, Azure Front Door includes built-in security capabilities such as DDoS protection and Web Application Firewall (WAF), safeguarding applications from common web vulnerabilities.

The other options do not accurately reflect the primary functions of Azure Front Door. For instance, enhancing the security of on-premises networks pertains more to traditional security measures rather than cloud-based application delivery. Managing virtual networks is focused on Azure's networking capabilities rather than the performance and security aspects of application accessibility. Lastly, developing mobile applications is unrelated to Azure Front Door's role, as this service is specifically designed for optimizing and securing application entry points, not for mobile app development.