Which policy category controls route advertisement and path preference decisions?

• A. File policy
• B. Control policy
• C. URL policy
• D. SNMP policy

Answer: (B)

Route advertisement and path preference decisions are made by the control plane, so they are governed by the control policy. In SD-WAN, the control policy defines how routing information is shared with other devices and how the best path is chosen for each destination. It determines which routes get advertised to peers and which transport link to prefer based on metrics, SLA requirements, application type, or other criteria. This is distinct from how traffic is finally forwarded once it’s on the data plane, which is handled by data-plane policies.

Other policy categories handle different concerns: file policy relates to file transfer controls, URL policy to web-content filtering or redirection, and SNMP policy to management and monitoring access. None of these dictate how routes are advertised or how paths are selected, which is why the control policy is the correct choice.