SD-WAN routes security-sensitive data across MPLS, VPNs, and _______________.

Question

Options

• AInternet circuits
• Bdark fiber
• Cwireless
• Dmicrowave

• A
  79% (15)
• B
  11% (2)
• C
  5% (1)
• D
  5% (1)

Explanation

SD-WAN (Software-Defined Wide Area Network) is specifically designed to intelligently route traffic across multiple transport types - MPLS for reliability, VPNs for encrypted tunneling, and Internet circuits (A) for cost-effective broad connectivity. The whole value proposition of SD-WAN is abstracting and unifying these diverse WAN transport options, including commodity internet, under centralized policy control.

Why the distractors are wrong:

• B (dark fiber) is a physical Layer 1 medium, not a WAN transport type SD-WAN manages at scale - it's typically leased raw fiber, not a standard SD-WAN circuit category.
• C (wireless) and D (microwave) are physical transmission methods, not WAN circuit types in the SD-WAN context; SD-WAN operates at the overlay level, not at the physical radio frequency layer.

Memory tip: Think of SD-WAN's core trio as "M-V-I" - MPLS (private, reliable), VPN (secure tunnels), Internet (cheap, ubiquitous). The "I" is the key differentiator that makes SD-WAN cost-effective compared to running pure MPLS.

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