There are various technologies used for Wide Area Networking (WAN) connectivity. Two of the most popular technologies are Software-Defined WAN (SD-WAN) and Secure Access Service Edge (SASE). While there are some similarities between the two technologies, there are also key differences that make them well-suited for different use cases. SASE is relatively new, while SD-WAN has been around for a few years. However, to understand the similarities between SASE and SD-WAN, it is important to understand both the technologies and their evolution out of traditional WAN.