Microsoft Certified: Azure Fundamentals (AZ-900) Practice Exam

What is the function of Azure Load Balancer?

1. To distribute traffic among virtual machines

2. To create virtual networks

3. To manage user permissions

4. To monitor database performance

The correct answer is: To distribute traffic among virtual machines

The Azure Load Balancer is designed primarily to distribute incoming network traffic across multiple virtual machines. This functionality ensures that no single virtual machine is overwhelmed with requests, thereby improving the availability and performance of applications. By balancing the load, it enhances the reliability of services and provides better fault tolerance in case one or more virtual machines fail. This capability is particularly essential in scenarios involving high volumes of traffic, as it helps maintain optimal response times and ensures a smoother user experience. The load balancer operates at both the transport layer (Layer 4) and the application layer (Layer 7), allowing it to handle different types of protocols and services effectively. The other options focus on different functionalities, such as creating virtual networks, managing user permissions, or monitoring database performance, which are not related to the primary role of the load balancer. Therefore, the key role of the Azure Load Balancer in distributing traffic among virtual machines is fundamental to enabling robust cloud services.