You are asked to create a proof of concept software-defined WAN (SD-WAN). You must identify its positive features for a project proposal. Which two statements are correct in this scenario? (Choose…

Question

Options

• ASD-WAN uses manual provisioning.
• BSD-WAN improves network security by encrypting WAN traffic.
• CSD-WAN abstracts the control plane of all routing devices to multiple controllers.
• DSD-WAN supports zero-touch provisioning.

• A
  10% (6)
• B
  75% (45)
• C
  15% (9)

Explanation

B is correct because SD-WAN encrypts traffic traversing the WAN using tunneling protocols (like IPsec), providing a built-in security layer that traditional WAN architectures lack. D is correct because SD-WAN is specifically designed for zero-touch provisioning (ZTP) - branch devices automatically receive their configuration from a central controller, eliminating the need for on-site engineers.

Option A is wrong because manual provisioning is the opposite of what SD-WAN offers; automated, centralized provisioning is one of its core selling points. Option C is a trap - SD-WAN does abstract the control plane, but it centralizes it to a single (or clustered) controller, not multiple separate controllers; the word "multiple" makes this statement inaccurate.

Memory tip: Think of SD-WAN as "Security + Deployment without hands" - Secure (encrypted WAN traffic) and Deployment is zero-touch. If you see "manual" or "multiple controllers" in SD-WAN answers, those are red flags.

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