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Legacy network topologies like hub-and-spoke and mesh models were designed for a world where devices inside the perimeter could trust one another by default. But in a Zero Trust world, trust is never implicit, and network communication must be policy-enforced, identity-driven, and isolated by design.

This paper introduces a new conceptual model – the Up and Out Topology – to define how Zero Trust networks should be built from the ground up. This topology is a key structural element of the broader Zero Surface Architecture, underpinning multiple products in the evolving ZERO portfolio, including Zero Trust Segmentation, ZERO SDWAN, and the Zero Trust Guest Gateway.