Software-defined wide area network

 

Software-defined wide area network (SD-WAN) is a type of computer network that enables the bonding of multiple internet access resources – such as DSL, cable, cellular, or any other IP transport – to provide reliable high throughput data channels.


SD-WAN abstracts connectivity options – like multiprotocol label switching (MPLS), mobile, and broadband – to create a virtual enterprise wide-area network (WAN).

An SD-WAN has a virtual WAN architecture and software-driven technology. A key element of a Software-defined wide area network is its centralized control, so those network connections, security mechanisms, policies, application flows, and general administration are separated from the associated hardware.

For security considerations, data communications between offices are typically transmitted via VPN and funneled through the main office facility. It is critical to have a high-throughput IP tunnel that is reliable for this data connection. If a branch office uses a single DSL, T1 or cable modem connection to communicate with the headquarter office, there may be insufficient throughput and speed – especially for uploading data from the branch office to the main office. Similarly, a single broadband line at the branch office will not provide the adequate up-time that business-critical applications demand.

Software-defined wide area network architecture enables a high-speed IP communication framework between a branch office and headquarters – as well as among branch offices – even over large geographic areas. The two devices form a transparent, high-speed data tunnel between them by combining access resources on each side.

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