By default, which type of traffic is configured by service route configuration to use the...

Basic Concept: Service routes decide which firewall interface is used for firewall-originated traffic such as updates, logging, telemetry, identity services, or cloud-delivered functions. By default many services use the management interface unless a service route overrides them.

Why D is Correct: ADEM-related traffic is a firewall-originated/cloud service function that is controlled by service route behavior and normally uses the management path unless changed.

Why A is Wrong: A security zone is a policy boundary for traffic passing through the firewall, not firewall-originated service traffic controlled by service routes.

Why B is Wrong: An IPSec tunnel carries VPN traffic. It is not a default service-route traffic type using the management interface.

Why C is Wrong: A VSYS is a virtual firewall context, not a service route destination or cloud service traffic type.