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.
Scaling of the centralized controller cluster is challenging for services like DHCP and load-balancing.
B.
It is highly-available by design with no single-point-of-failure risks present.
C.
Integrating smart NIC capabilities on the local host level is made easier through REST APIs.
D.
It significantly improves the latency when performing reactive handling of PACKET_IN events.
E.
The centralized controller can support all southbound APIs, which allows for easy integration with legacy equipment.
A (Scaling challenges for services):Centralized SDN controllers may experience scalability challenges for distributed services like DHCP and load balancing since these often require real-time responsiveness and distributed service locality.
D (Latency in reactive handling):Centralized controllers may introduce additional latency during reactive PACKET_IN event handling as control decisions traverse the control plane before forwarding happens.
Other options explained:
B: Centralized controllers still present failure domain risks; high-availability must be explicitly designed.
C: Smart NICs operate primarily at the host level, often independently of centralized SDN controllers.
E: Legacy equipment often lacks support for many SDN southbound APIs.
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