This Momentum ebook compares MPLS and SD-WAN and argues MPLS is increasingly mismatched to modern demands like distributed work and IoT because it is rigid, struggles with rising bandwidth needs, and is unencrypted by default, creating security exposure (pages 2–3). It explains SD-WAN as a policy-based overlay that routes traffic over the best available transport (broadband, 4G, etc.) and outlines three architecture models: on-premise, cloud-enabled, and internet-based (page 4). The ebook highlights SD-WAN benefits in performance, scalability, centralized management, security via encrypted tunnels and segmentation, and cost reduction (with some citing 50%+ savings) (page 5). It concludes that while MPLS still has niche use cases, SD-WAN is usually the better choice today, and it promotes M

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