Which of the following controllers (if any) uses a mostly centralized control plane model?
- OpenDaylight Controller
- Cisco Application Policy Infrastructure Controller (APIC)
- Cisco APIC Enterprise Module (APIC-EM)
- None of these controllers uses a mostly centralized control plane.
Explanation: The OpenDaylight Controller uses an Open SDN model with an OpenFlow southbound interface as defined by the Open Networking Foundation (ONF). The ONF SDN model centralizes most control plane functions. The APIC model for data centers partially centralizes control plane functions. The APIC-EM controller (as of time of publication) makes no changes to the control plane of routers and switches, leaving those to run with a completely distributed control plane.
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