AZ-900 Practice Question 76: Traffic Manager DNS Routing
Microsoft Azure Fundamentals (AZ-900) · Test 8 · question 6 of 10
A company runs identical copies of its website in three separate Azure regions. It wants client DNS lookups automatically directed to the closest healthy region, and traffic redirected away from any region whose deployment goes down. Which service provides this?
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Answer:
Traffic Manager is a DNS-based traffic load balancer that distributes traffic to public-facing applications across global Azure regions. It monitors the health of every endpoint and can route by performance so a client resolves to its closest region, and it fails traffic away from an endpoint automatically if that region's deployment stops responding, exactly the two behaviors described.
Option A, Azure Load Balancer, balances traffic across instances inside one region's backend pool; it has no DNS component and no concept of choosing between independent regional deployments. Option C, Application Gateway, is also a single-region, single-virtual-network service, not a mechanism for directing clients to one of several regions. Option D, VNet peering, connects two virtual networks so resources in them can talk to each other directly; it routes network traffic between networks, not client DNS queries between regional deployments.
Reference: Azure Traffic Manager overview