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Why this module exists. SD-WAN and SASE (Secure Access Service Edge) are the modern WAN architectures replacing MPLS for distributed enterprises. They consolidate networking and security into cloud-delivered platforms. This module covers the architecture and the security considerations.
The traditional WAN vs SD-WAN
| Traditional | SD-WAN |
|---|---|
| MPLS private circuits | Internet underlay with overlay tunnels |
| All branches → HQ → internet | Local internet break-out at branches |
| Static routing | Dynamic policy-driven path selection |
| High cost per Mbps | Internet-economics pricing |
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