Exam 350-701 topic 1 question 47 discussion

Official Cert Guide: "Southbound APIs enable SDN controllers to dynamically make changes based on real-time demands and scalability needs." But... the Northbound APIs communicates with the control plane applications, not the Southbound APIs. So technically C is still correct, even though Southbound APIs make dynamic changes it still makes changes, hence does not have to say it makes the changes dynamically. This is one of them questions to catch you off guard. The key is the control plane applications. Northbound also uses the REST.

C appears most accurate here

C is the best amongst a bunch of really bad alternatives. Don't think its B as there is mention of REST but not REST API. Don't think its either A or D because SDN controllers either control north (application) or south (network/switch)

C. to enable the controller to make changes. The southbound API protocol of a Software-Defined Network (SDN) enables communication between the SDN controller and the networking devices, such as switches and routers, in the network. This allows the controller to make changes and manage the network's configuration.

In an SDN architecture, southbound APIs are used to communicate between the SDN controller and the switches and routers within the infrastructure. These APIs can be open or proprietary.Southbound APIs enable SDN controllers to dynamically make changes based on real-time demands and scalability needs. OpenFlow and Cisco OpFlex provide southbound API capabilities. Above is an extract from the OCG (Official Cert Guide for the exam).

C Southbound APIs enable SDN controllers to dynamically make changes based on real-time demands and scalability needs. OpenFlow and Cisco OpFlex provide southbound API capabilities. Santos, Omar. CCNP and CCIE Security Core SCOR 350-701 Official Cert Guide (p. 118). Pearson Education. Kindle Edition.

C How Do SDN Southbound APIs Work? Southbound APIs facilitate control over the network and enable the SDN Controller to dynamically make changes according to real-time demands and needs. OpenFlow, which was developed by the Open Networking Foundation (ONF), is the first and probably most well-known southbound interface. OpenFlow defines the way the SDN Controller should interact with the forwarding plane to make adjustments to the network, so it can better adapt to changing business requirements. With OpenFlow, entries can be added and removed to the internal flow-table of switches and routers to make the network more responsive to real-time traffic demands.

I go with C as only Northbound APIs deals with control plane

C? But it allows the controller to [dynamically] make changes. Doesn't mention about the control plane?

Southbound APIs facilitate control over the network and enable the SDN Controller to dynamically make changes according to real-time demands and needs. D is the correct answer

D. to allow for the dynamic configuration of control plane applications its correct