Answer should be C
A. Don't even understand what it means
B. that's the opposite of what SDN is
C. Most SDN solutions reuse existing hardware. Just add controllers.
D. Management is centralized in SDN
Software-Defined Networking (SDN) separates the control plane from the data plane, centralizing network management and allowing for more flexible, programmable network configurations. This abstraction enables older hardware to be repurposed because SDN controllers manage the network dynamically, reducing dependency on proprietary hardware upgrades.
Why the other options are incorrect:
A. They simplify operations by creating a concrete copy of the network.
SDN simplifies network management, but it does not create a "concrete copy" of the network. Instead, it virtualizes and centralizes network control.
B. They reduce complexity by coupling the control and the data plane.
SDN actually decouples the control plane from the data plane, centralizing network intelligence in a software-based controller.
D. They deliver a distributed management architecture that provides better resilience to errors.
SDN primarily uses a centralized control plane rather than a distributed management architecture. Traditional networks rely more on distributed control mechanisms.
SDN centralises management.
Ref: https://www.cisco.com/c/en/us/solutions/software-defined-networking/overview.html
What is software-defined networking (SDN)?
SDN is an architecture designed to make a network more flexible and easier to manage. SDN centralizes management by abstracting the control plane from the data forwarding function in the discrete networking device.
All the best,
I Agree with NoobChampion, seems like C is the most correct answer. A, B and D are all wrong for the reasons stated by NoobChampion, C isn't always True but it definitely isn't always False, so it has to be C
The only problem with D is that SDN doesn't distribute management it centralizes management. Like noobchamp said, A is gibberish and B is the opposite of what SDN is for. C is the correct answer
"Cisco vManage provides a highly visualized dashboard that simplifies network operations. It provides centralized configuration, management, operation, and monitoring across the entire SD-WAN fabric."
"Benefits of the Cisco SD-WAN Analytics solution
Application experience: See detailed metrics and waterfalls showing the sequential fetching and loading of web components, so you can identify errors and bottlenecks and understand the impact on application performance."
https://www.cisco.com/c/en/us/solutions/collateral/enterprise-networks/sd-wan/nb-06-sd-wan-sol-overview-cte-en.html
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