AZ-305 Question #195: Real Exam Question with Answer & Explanation

Question

Hotspot Question You plan to deploy a custom database solution that will have multiple instances as shown in the following table. Client applications will access database servers by using db.contoso.com. You need to recommend load balancing services for the planned deployment. The solution must meet the following requirements: - Access to at least one database server must be maintained in the event of a regional outage. - The virtual machines must not connect to the internet directly. What should you include in the recommendation? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point. Answer:

Options

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Explanation

This hotspot question tests knowledge of Azure load balancing services for a multi-region database deployment that must survive regional outages without exposing VMs directly to the internet.

Approach. For global load balancing across regions using a DNS name (db.contoso.com) with failover capability during regional outages, Azure Traffic Manager is the correct choice - it is a DNS-based global traffic routing service that distributes traffic across regions and maintains availability during regional failures. For load balancing within each region among the database VMs without exposing them to the internet, an Internal (Private) Azure Load Balancer (Standard tier, internal) is appropriate, as it operates at Layer 4 within a VNet without a public IP, ensuring VMs do not connect to or receive traffic from the internet directly. Traffic Manager handles the global DNS resolution to the correct regional endpoint, while the internal load balancer distributes traffic among VM instances within each region.

Concept tested. Azure load balancing architecture: using Azure Traffic Manager for global DNS-based failover across regions, and Azure Internal Load Balancer for intra-region distribution without internet exposure - distinguishing between global vs. regional and public vs. internal load balancing options.

Reference. https://learn.microsoft.com/en-us/azure/architecture/guide/technology-choices/load-balancing-overview

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