AZ-900 Question #175: Real Exam Question with Answer & Explanation

Question

An organization is operating with three Availability Zones (AZ). It is decided to deploy multiple instances of a web application across all three AZs. An Azure networking product is then configured by the organization so the service requests can be evenly distributed across all the three instances. Can you identify the Azure networking product that will be used?

Options

• AContent delivery network
• BApplication Gateway
• CLoad Balancer
• DWeb Application firewall

Explanation

To distribute web application service requests evenly across multiple instances deployed in different Availability Zones, an Azure Application Gateway should be used.

Common mistakes.

• A. A Content Delivery Network (CDN) primarily caches web content at edge locations to reduce latency, not for distributing live application requests among backend servers.
• C. An Azure Load Balancer operates at Layer 4 (TCP/UDP) and performs basic traffic distribution based on IP address and port, lacking the advanced web application routing capabilities of Application Gateway.
• D. A Web Application Firewall (WAF) protects web applications from common web exploits and vulnerabilities, but its primary function is security, not traffic distribution across application instances.

Concept tested. Azure Application Gateway for Layer 7 load balancing

Reference. https://learn.microsoft.com/en-us/azure/application-gateway/overview

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