Microsoft Azure Architect Design (AZ-301) 2025 – 400 Free Practice Questions to Pass the Exam

Azure Load Balancer plays a crucial role in ensuring high availability for critical applications by distributing network traffic across multiple servers or resources. This distribution helps to prevent any single server from becoming a bottleneck, thereby enabling applications to handle more users concurrently and reducing downtime.

In a high availability setup, if one server fails, the Load Balancer can redistribute traffic to other healthy servers automatically, ensuring that users experience minimal disruption. This capability is essential for maintaining uptime and performance in scenarios where applications are expected to be continuously available.

Additionally, the Load Balancer operates at various layers, including the network and application layers, allowing it to cater to different types of traffic and workloads. Its ability to perform health checks on backend servers ensures that only healthy instances receive traffic, further contributing to the overall reliability of the application environment.

Although other services like Azure Traffic Manager and Azure Backup also support high availability in different ways—Traffic Manager by routing traffic based on performance and Backup by ensuring data recovery—they do not directly contribute to the real-time management and distribution of traffic to ensure seamless application availability. Thus, Azure Load Balancer stands out as the most effective solution for maintaining high availability of applications in Azure.