“DCN is increasingly being treated as an end-to-end operating model that standardizes connectivity, security policy enforcement, and telemetry across the user, middle mile, and cloud/application edge,” Sanchez said.
Dell’Oro defines DCN as a platform and service that provides consistent connectivity, policy enforcement, and telemetry from users over the WAN to the distributed cloud and application edge across branch sites, data centers, and public clouds. This category is becoming more relevant as hybrid architectures and AI-era traffic patterns increase the operational penalties of a fragmented control plane.
Dell’Oro research shows that DCN buyers go beyond discrete upgrades and prioritize architectures that reduce operational seams across connectivity, security, and telemetry, so incident response and change management can follow a single thread.
A DCN is unique in that it links the user and application experience to where policy and visibility is applied. This becomes important as application delivery paths become more dynamic and workloads move between on-premises data centers, public clouds, and edge locations. The architectural requirement is to eliminate handoffs between networking and security teams rather than optimizing individual network segments.
Regions where DCN is growing fastest
Cloud/Application Edge is the fastest growing of the DCN pillars. This segment deploys policy enforcement and telemetry collection points adjacent to the workload, rather than backhauling traffic to a central security stack.
“Multi-cloud is still a reality, but it’s no longer a permanent driver in and of itself,” Sanchez said. “The cloud/application edge is accelerating as enterprises seek to make application paths predictable and secure across hybrid environments. This requires application-aware steering, policy enforcement, and unified telemetry closer to the workloads.”
