The controller has a global view of the network, and it can easily ensure that the network is in a consistent and optimal configuration. Which two statements describe a centralized SDN control path? (Choose two.)
A.
It significantly improves the latency when performing reactive handling of PACKET_IN events
B.
Integrating smart NIC capabilities on the local host level is made easier through rest APIs
C.
A centralized controller can support all southbound APIs, which allows for easy integration with legacy equipment
D.
It is highly-available by design with no single-point-of-failure risks present
E.
Scaling of the centralized controller cluster is challenging for services like DHCP and load-balancing
C. A centralized controller can support all southbound APIs, which allows for easy integration with legacy equipment. The controller acts as a central point of control and can communicate with network devices using southbound APIs. This allows for seamless integration with existing legacy equipment, enabling centralized management and control.
E. Scaling of the centralized controller cluster is challenging for services like DHCP and load-balancing. As the network grows and the number of devices and services increases, scaling the centralized controller cluster can become challenging, especially for services that require stateful handling such as DHCP (Dynamic Host Configuration Protocol) and load-balancing. The stateful nature of these services adds complexity to the scaling process.
The other statements (A, B, D) are not accurate descriptions of a centralized SDN control path.
I think CE is correct. If the controller fail the management plane is gone. So what. We need to bring it back for changes. As long as controlplan and dataplan is independent a controller outage is not a big deal
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