Dell’Oro Group is making a bullish call on the future of enterprise networking, forecasting that worldwide distributed cloud networking (DCN) revenue will reach $21 billion by 2029, growing at a 30% compound annual growth rate over the next five years.

A report from the analyst firm said DCN is gaining relevance as hybrid architectures and AI-era traffic patterns increase the operational cost of fragmented control planes across networking and security domains.

DCN, as defined by Dell’Oro, includes platforms and services that deliver consistent connectivity, policy enforcement, and telemetry from users across the WAN, to distributed cloud and application edges spanning branch sites, data centers, and public cloud environments.

“DCN buyers are moving beyond isolated upgrades and are prioritizing architectures that reduce operational seams across connectivity, security, and telemetry so that incident response and change control can follow a single thread,” said Mauricio Sanchez, senior director of enterprise security and networking at Dell’Oro Group.

“What makes DCN distinct is that it links user-to-application experience with where policy and visibility are enforced, which is why application-adjacent controls are now influencing WAN decisions that used to be driven primarily by transport,” Sanchez added.

Cloud & application edge drive growth; middle mile remains foundational

Dell’Oro said the cloud and application edge is the fastest-growing pillar of DCN as enterprises push application-aware steering, consistent policy, and unified telemetry closer to workloads across environments.

As application delivery paths become more dynamic, buyers are favoring platforms that simplify policy placement and reduce handoffs between networking and security teams. The firm said this shift reflects growing operational complexity as enterprises scale distributed applications and AI workloads.

While access technologies continue to evolve, Dell’Oro emphasized that the WAN middle mile remains foundational to DCN architectures. Performance outcomes depend on more than last-mile access, particularly when applications traverse multiple networks and cloud on-ramps.

Enterprises and service providers continue to prioritize predictable transport, resiliency, and operational accountability, reinforcing the importance of backbone reach and end-to-end service assurance.

User edge continues to converge

At the user and WAN edge, Dell’Oro said secure access, SD-WAN, and policy enforcement continue to converge. This is creating demand for consistent user-to-application controls that remain portable across environments.

Buyers increasingly expect tighter integration so that policy intent and experience telemetry remain coherent from the point of entry through to the application workload.

Dell’Oro said the convergence of these three pillars – user edge, middle mile, and application edge – is reshaping how enterprises evaluate WAN architectures. As AI-era applications continue to alter traffic patterns and operational requirements, the firm expects distributed cloud networking to play a central role in enterprise WAN modernization strategies.