Compared with traditional networks, SD-WAN can better ensure application experience. Which of the following is the main reason?

Compared with traditional networks, SD-WAN can better ensure application experience. Which of the following is the main reason?
A . SD-WAN can use IPsec technology to realize encrypted transmission of packets
B . SD-WAN can provide different routing strategies and different QoS strategies for different applications
C . SD-WAN can build various networking types such as Full Mesh, Hub-Spoke, Partial Mesh, etc.
D . SD-WAN can realize multi-department business isolation based on VRF

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Answer: B