📖 What is SDN Controller?
The centralized 'brain' of a Software-Defined Network that manages flow control and defines how the underlying network devices (switches/routers) handle traffic.
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Sensei Says:
"Remember that the controller communicates with the infrastructure via Southbound APIs (like OpenFlow or NETCONF) and with applications via Northbound APIs (typically REST)."
📚 Certification: Certified Network Associate (200-301)
🔑 What are the Key Concepts of SDN Controller?
- ▸ Centralized control plane
- ▸ Separates control plane from data plane
- ▸ Uses Northbound and Southbound APIs
🎯 How does SDN Controller appear on the 200-301 Exam?
Explaining the role of the SDN controller in a software-defined architecture.
Identifying Cisco DNA Center as an example of an SDN controller in an enterprise network.
❓ Frequently Asked Questions
What is the primary benefit of an SDN controller?
It provides a centralized point of management and abstracts the control plane from individual network devices.
How does an SDN controller communicate with the physical network devices?
It uses Southbound APIs like NETCONF, RESTCONF, or OpenFlow.
Related Terms from Certified Network Associate
Extended ACL
Dynamic ARP Inspection (DAI)
Static Route
Virtual Machine (VM)
Syslog
Bridge Protocol Data Unit (BPDU)