Exam DEA-1TT4 topic 1 question 28 discussion

I think it's B "The architecture of SDN consists of three layers along with APIs in between to define the communication.  Infrastructure Layer: This layer consists of networking devices such as switches and routers. It is responsible for handling data packets such as forwarding or dropping of packets and handling the devices. This layer forms the data plane and performs actions based on the instructions received.  Control Layer: This layer consists of controllers and acts as a the brain of the SDN architecture. It is responsible for making decisions such as how the packets should be forwarded based on the requirements, and relays the decisions to the networking devices (data plane) for execution. It also extracts the information about the network from the data plane and communicates it to the application layer. This layer forms the control plane.  Application Layer: This layer consists of applications and services such as business applications, and analytics that define the network behavior through policies and also define the requirements. It communicates the requirements through the APIs to the control layer. This layer forms the application plane of the SDN architecture."

Application Layer: This layer consists of applications and services such as business applications, and analytics that define the network behavior through policies and also define the requirements. It communicates the requirements through the APIs to the control layer. I think the correct is the D:

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well explained by amtavt - B

Agree B

C is correct