Which two describe characteristics of a controller-based network? (Choose two.)
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Correct answer: Uses northbound and southbound APIs between architectural layers., Centralizes the control plane..
Why this is the answer
A controller-based network centralizes the control plane, meaning a single controller or cluster makes forwarding decisions for all connected devices. This contrasts with traditional networks where each device makes independent forwarding decisions (decentralized control plane). The controller communicates with network devices (like switches and routers) using southbound APIs (e.g., OpenFlow, NETCONF), and with applications or orchestration systems using northbound APIs. Telnet is a protocol for remote access, not for reporting system issues in this context, and while CLI can be used for initial setup, the primary configuration method in a controller-based network is often through the controller's interface or APIs.
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