Microsoft Azure Administrator Associate AZ-104 Practice Question

User-defined routes in Azure allow you to override the default system routes and control the flow of network traffic. Configuring a user-defined route is necessary when you need to direct traffic through a network virtual appliance, such as a firewall or load balancer. The other options do not require user-defined routes: automatic routing between subnets is handled by Azure's default system routes; DNS name resolution is configured through Azure DNS or custom DNS servers; and assigning static IP addresses is managed through network interface configurations, not routing.