Which technology limits communication between nodes on the same network segment to individual applications?

Serverless infrastructure is a cloud execution model where the cloud provider manages the underlying servers, focusing on function execution rather than network segmentation.

Microsegmentation applies fine-grained security policies to individual workloads, applications, or services, even within the same network segment, to restrict communication strictly to necessary pathways, thereby significantly reducing the attack surface and containing potential breaches by preventing lateral movement.

SaaS deployment describes software delivered as a service over the internet, which is a consumption model, not a network security segmentation technology.

Machine-to-machine firewalling is a generic concept, but microsegmentation is the established and precise term for applying granular security policies at the workload or application level within a segment.