As the use of business-critical, cloud-based applications and tools continues to increase, distributed organizations with multiple remote offices are switching from performance-inhibited wide-area networks (WANs) to software-defined WAN (SD-WAN) architectures. SD-WAN offers faster connectivity, cost savings, and performance for Software-as-a-Service (SaaS) applications as well as digital voice and video services. But SD-WAN has its own shortcomings—especially when it comes to security.