Which Microsoft Azure component is used to support firewall high availability?

The Azure Load Balancer plays a crucial role in achieving high availability for firewall scenarios in Microsoft Azure. It is designed to distribute incoming traffic among multiple servers to ensure that no single server is overwhelmed, which enhances availability, reliability, and responsiveness of applications and services. By routing traffic to healthy instances of a firewall, the Azure Load Balancer ensures that even if one instance experiences issues, traffic can seamlessly shift to another functioning instance, thus maintaining continuous service availability.

In the context of high availability for firewalls, the Azure Load Balancer also provides load distribution capabilities, allowing organizations to run multiple firewall instances behind it. This can be critical in scenarios where firewalls require redundancy, scaling, and consistent performance to manage traffic effectively.

Other components such as Application Gateway, while useful for application layer routing and providing Web Application Firewall features, do not specifically focus on the high availability aspect as it relates to traditional network firewalls. Traffic Shaper is not a recognized Azure service and would not provide the necessary capabilities for managing firewall high availability. Azure DNS Balancer, while important for domain naming services and directing traffic based on DNS queries, does not directly contribute to firewall availability management.

Thus, the Azure Load Balancer is the most appropriate choice for ensuring high availability specifically in