Which of the following statements is true with regard to SDN?

A.
It combines the control plane and the data plane

B.
It separates the data plane and the forwarding plan

C.
It implements the control plane as software

D.
It implements the data plane as software

Explanation:
In Software-defined networking (SDN), the control plane is separated from the data (or forwarding) plane and is
implemented through software. The data plane remains on each physical device but the control plane is
managed centrally for all devices though software.
SDN does not combine the data and control plane. Instead it decouples them.
SDN does not separate the data plane and the forwarding plan. These are both names for the same plane; that
is, a data plane is a forwarding plane.
SDN does not implement the data plane as software. The data plane remains on each physical device.
Objective:
Infrastructure Management
Sub-Objective:
Describe network programmability in enterprise network architecture

Software Defined Networking: The Cisco approach