Which technology uses software-defined mechanisms to create virtual tunnels and overlay networks across multiple transport types?

Which technology uses software-defined mechanisms to create virtual tunnels and overlay networks across multiple transport types?

• A. Software-Defined Wide Area Network
• B. Wide Area Network
• C. Local Area Network
• D. Virtual Private Network

Answer: (A)

Software-defined wide area networking uses a software-driven control plane to create and manage virtual tunnels that form an overlay network across diverse transport types such as MPLS, broadband Internet, and cellular links. The central orchestrator applies policies, monitors performance, and dynamically steers traffic for applications to the most appropriate path. Encapsulation tunnels—like IPsec or VXLAN—connect sites and cloud resources, delivering a unified WAN view despite the underlying physical media. This combination of software-defined control, tunneling, and multi-transport support is what defines the technology described in the question. Traditional WANs describe connectivity but without the software-defined overlay management across heterogeneous links, and VPNs describe tunneling primarily for secure communication rather than orchestrated, multi-path overlay networks.

Software-defined wide area networking uses a software-driven control plane to create and manage virtual tunnels that form an overlay network across diverse transport types such as MPLS, broadband Internet, and cellular links. The central orchestrator applies policies, monitors performance, and dynamically steers traffic for applications to the most appropriate path. Encapsulation tunnels—like IPsec or VXLAN—connect sites and cloud resources, delivering a unified WAN view despite the underlying physical media. This combination of software-defined control, tunneling, and multi-transport support is what defines the technology described in the question. Traditional WANs describe connectivity but without the software-defined overlay management across heterogeneous links, and VPNs describe tunneling primarily for secure communication rather than orchestrated, multi-path overlay networks.