Why AI is putting the Internet backbone back in the spotlight

Much of today’s discussion around AI focuses on applications, data centers and the edge. Yet every digital service ultimately depends on a layer of infrastructure that receives far less attention: the backbone networks connecting cloud regions, data centers, Internet exchanges and enterprises around the world.

For decades, these networks have quietly carried the traffic behind everything from cloud applications to video conferencing and digital commerce. They were designed to operate in the background, and for the most part they still do.

What is changing is not the importance of the backbone itself. What is changing is how dependent modern services are becoming on the resilience, performance and control it provides. As AI workloads become more distributed, organizations are paying closer attention to the foundations that connect their digital infrastructure together.

The foundation behind digital services

When discussing digital infrastructure, the conversation often revolves around applications, cloud platforms and compute resources. But none of these exist in isolation.

Data must move constantly between users, cloud environments, AI platforms and data centers, often across countries and continents. The backbone is the infrastructure that makes this possible, providing the long-haul connectivity on which other networks depend.

While enterprises may connect to cloud providers or local access networks, the traffic between those environments ultimately relies on backbone infrastructure. Without it, cloud services, AI workloads and digital applications would simply not operate at global scale.

Resilience starts with architecture

As demand for connectivity grows, capacity often receives most of the attention. Yet capacity and resilience solve fundamentally different problems.

Capacity determines how much traffic a network can carry. Resilience depends on how the network is designed.

Resilience is built into the architecture through route diversity, network design and operational control. A network can have significant spare capacity and still be vulnerable if multiple paths depend on the same underlying infrastructure.

This is particularly important for backbone networks because they sit beneath so many critical services. When enterprises rely on applications spread across multiple clouds, regions and data centers, resilience becomes an architectural requirement rather than simply a capacity consideration.

The backbone is taking on a bigger role

AI is accelerating already existing trends toward more distributed architectures.

Data increasingly moves between cloud providers, data centers and specialized processing environments, creating more complex traffic flows than many organizations have traditionally managed. The challenge is not simply transporting more traffic, but ensuring that traffic moves efficiently, predictably and reliably between a growing number of interconnected environments.

This places greater demands on backbone infrastructure. Visibility, traffic engineering and routing decisions become increasingly important because they directly influence how critical services perform.

Control matters as much as connectivity

Another shift is the growing focus on how traffic moves through the network.

Organizations are paying closer attention to data sovereignty, compliance requirements and the paths their sensitive information takes between locations. As a result, there is increasing demand for deterministic routing approaches that provide greater control over how traffic flows across the backbone.

This changes the conversation from simple connectivity to controlled connectivity.

Increasingly, enterprises are asking whether their most critical traffic is travelling over the right architecture and the right infrastructure. Those questions are becoming just as important as questions about bandwidth or performance.

Why the backbone matters more than ever

The Internet backbone has always been essential. What has changed is the extent to which modern applications depend on it.

As AI, cloud services and distributed architectures continue to evolve, organizations are being forced to look beyond applications and compute resources to the infrastructure connecting them. Questions about resilience, routing and control are becoming more important because the network increasingly underpins business-critical services.

For years, the backbone was largely invisible. Today, enterprises are beginning to recognize that the reliability of their most important applications ultimately depends on the networks operating underneath them.

And that is putting the Internet backbone back in the spotlight.

Ana Romero Oses, Director of Engineering & Architecture