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

What distributes traffic evenly among each system in a pool and can help you achieve both high availability and resiliency?

1. Load Balancer

2. Network Security Group

3. Traffic Manager

4. Gateway

The correct answer is: Load Balancer

The correct answer is indeed a Load Balancer. A Load Balancer is a network device that efficiently distributes incoming network or application traffic across multiple servers. This ensures that no single server becomes a bottleneck, allowing for better resource utilization, improved responsiveness, and increased availability of applications. By distributing the traffic evenly across a pool of resources, a Load Balancer enhances both high availability and resiliency. If one server in the pool fails or requires maintenance, the Load Balancer will redirect the traffic to the remaining operational servers, ensuring that users experience minimal impact on service availability. The other options serve different purposes: - A Network Security Group is primarily used to manage inbound and outbound traffic rules for Azure resources, focusing on security rather than load distribution. - Traffic Manager is a DNS-based service that provides traffic routing, but it does not distribute traffic at the transport layer. Instead, it directs users to the closest endpoint based on several routing methods, which optimizes performance but does not directly balance loads. - A Gateway, in the context of Azure, typically refers to services that facilitate connectivity between different networks, such as VPN or ExpressRoute, but it does not distribute traffic among multiple servers. In summary, a Load Balancer is specifically designed to distribute