Short answer
SD-WAN (software-defined wide area networking) is a software layer that sits on top of your network links. It manages several links across your sites and decides where traffic goes. It bases that on what each application needs, how each link is performing and your business rules. FirstNet SD-WAN is managed centrally and driven by policy. It keeps business-critical applications predictable, even when one link slows down or fails.
In detail: What is SD-WAN for business networks
What FirstNet SD-WAN provides:
- Dynamic path selection and failover across multiple links
- Load balancing and application-aware traffic steering
- Quality of Service for business-critical applications
- Integrated security policy enforcement
- Centralised visibility and governance across all sites
SD-WAN controls how traffic uses your links. It does not make a poor last mile (the final connection into your building) faster. It also does not remove contention (sharing capacity with other users). So it needs at least two links per site. FirstNet's best practice is two diverse underlays, meaning two different physical links underneath, often one fibre and one wireless. FirstNet can supply those links itself: broadband, DIA (dedicated internet access), LTE/5G, microwave and LEO (low-Earth-orbit) satellite. Hybrid designs let MPLS private network links and internet links run side by side, so you can migrate in phases.
It suits retail and branch networks where uptime drives revenue, municipalities that need standardised behaviour across many sites, and cloud-heavy enterprises. FirstNet's Connectivity and Security teams validate each design together before rollout.