SDN emerged as a technology trend that attracted many industries to move from traditional networks to SDN. Which challenge is solved by SDN for cloud service providers?
A.
need for intelligent traffic monitoring
B.
exponential growth of resource-intensive application
C.
complex and distributed management flow
D.
higher operating expense and capital expenditure
Hard to decide - 'B' or 'C' - in light of the exponential growth of traffic stemming from increasing virtualization, real-time applications, and the adoption of cloud-based services, SDN has arrived just in time.
https://blog.zones.com/increase-data-center-flexibility-scalability-and-efficiency
B as per Cisco doc.
Today’s resource intensive applications are making the network traffic grow exponentially putting high demands on the existing network. Companies are finding it challenging to differentiate the critical applications from non-critical ones and to dynamically allocate the network resources to higher priority applications. As a result, customers are seeking a solution to make the network application-aware by intelligently monitoring and routing the network traffic. https://www.cisco.com/c/dam/assets/events/i/interop-ny-Cisco-XNC.pdf
But this description is from the perspective of the companies using the service. The question is from the point of view of the service providers. I'd choose C since SDN. improves and streamlines management functions.
https://www.ciena.com/insights/what-is/What-Is-SDN.html#:~:text=By%20opening%20up%20traditionally%20closed%20network%20platforms%20and,may%20be%20made%20up%20of%20complex%20technology%20parts.
By opening up traditionally closed network platforms and implementing a common SDN control layer, operators can manage the entire network and its devices consistently, regardless of the complexity of the underlying network technology.
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