A) No. That's not specific to SD-WAN
B) Yes. Separate data plane and control plane
C) No. Real-time traffic is focus on latency and QoS.
D) Yes. Exactly stated "SD-WAN unifies the WAN backbone" in below site:
https://www.kyndryl.com/in/en/learn/sd-wan
E) No. MPLS also can do that.
the same link also sates that "SD-WAN handles future scenarios using centralized policy-based, real-time traffic steering ..." which contradicts your answer C.
I disagree with the answers so far.
B - separates infrastructure and policy - So what? How is this an advantage?
D - unifies the WAN backbone - Again so what? How is this an advantage?
With A, you have FEC improving efficiency and C policy-based forwarding (link steering) and
it reduces complexity as you would have to configure PBR for MPLS.
So A and C for me.
See this:
https://www.cisco.com/c/en_uk/solutions/enterprise-networks/sd-wan/what-is-sd-wan.html#~benefits
"While MPLS handled failure scenarios with backup links, SD-WAN handles them with real-time traffic steering based on centralized policy. Also, since SD-WAN unifies the entire WAN backbone, it delivers comprehensive analytics across the network globally. This wasn't possible before, because of disparate pieces of infrastructure and policy."
- However, answers are saying something different than this sentence. go figure. it talks about "real time traffic steering" not "real time traffic".
- Also says "disparate pieces of infrastructure and policy" before SD-WAN. Not that SD-WAN separates the infrastructure and policy....
So I'd say closest would be C&D
A and C to me.
I believe it's about traffic optimization:
FEC - remediates los over poor quality links;
PBR - "dynamic" routing for selected/critical applications.
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