The rapid adoption of SaaS applications is prompting network administrators to reevaluate their enterprise WAN infrastructure and services. As the traffic pattern on enterprise WAN’s shifts from branch-to-hub to branch-to-Internet, the hub-and-spoke topology associated with legacy MPLS IP VPN’s becomes an increasingly poor fit for the business. Compounding this tectonic shift, the cost-per-bit of MPLS is generally about 10x the cost of broadband Internet service. SD-WAN solutions enable enterprise WAN networks to be built using Internet service (along with MPLS) as the underlying transport. Beyond the cost savings due to low-cost bandwidth, broadband services also offer the promise of directly connecting branch office workers to SaaS services.