Among the following options, the highlight of the service orchestration of the Agile controller is: (Multiple Choice)

Among the following options, the highlight of the service orchestration of the Agile controller is: (Multiple Choice)
A . Based on the three-layer GRE tunnel arrangement, the networking mode and deployment location of business equipment are more flexible.
B . Perform business orchestration through topology visualization, with simple configuration and convenient management.
C . The addition and deletion of service equipment does not change the forwarding route of the existing network, and does not change the physical topology of the existing network.
D . No manual maintenance is required, and the business is analyzed and arranged automatically.

Answer: ABC