What is an advantage of designing an out-of-band network management solution?

Drag and Drop Question
Drag and drop the steps WAN Edge performs when on-boarded into the Cisco SD-WAN overlay from the left into the order they are completed on the right.

An engineer is designing a campus network with Cisco Catalyst 9500 switches in the aggregation layer. The design requires running nonblocking Layer 2 MEC from the aggregation layer to the access layer. The Catalyst switches are located on different campus floors for availability reasons, and each access switch will contain a single VLAN. Which technology must the engineer choose for the aggregation switches in the design?

What is the easiest way to enable SD-Access for all your remote sites after you have your campus SD-Access fabric up and running?

Refer to the exhibit. A customer experienced an unexpected network outage when the link between R1 and R2 went down. An architect must design a solution to ensure network continuity in the event the link tails again. Which solution should the design include?