Power availability dominates most discussions of data center site selection in 2026, and for good reason — but network topology, particularly access to diverse, high-capacity fiber routes and subsea cable systems, remains a determinant of site viability that deserves nearly as much scrutiny, especially for facilities serving latency-sensitive or internationally connected workloads.
Why Network Topology Shapes Site Viability
A data center's usefulness depends not just on its raw compute and power capacity, but on how effectively that capacity can be reached by the users and systems that need it. Sites with access to multiple, physically diverse fiber routes offer better resilience against the accidental cable cuts, construction damage, or natural disasters that periodically disrupt single-route connectivity. Sites near subsea cable landing stations or major internet exchange points offer materially better international connectivity than equally power-rich sites further from this infrastructure.
This creates a genuine tension in site selection for some markets: the locations with the most abundant, least contended power capacity are not always the locations with the strongest existing network infrastructure, and developers increasingly need to evaluate this trade-off explicitly rather than defaulting to whichever factor is easiest to assess.
Subsea Cables as Strategic Infrastructure
- Subsea cable systems connecting Europe to North America, Africa, and Asia represent some of the most consequential digital infrastructure investments globally, and their landing points create durable connectivity advantages for nearby data center development
- New subsea cable projects are increasingly co-developed or anchored by major cloud and AI infrastructure operators specifically seeking to secure connectivity capacity for their own facility networks
- Subsea cable capacity, like other infrastructure categories discussed throughout this sector, has its own lead times and supply chain dynamics — cable-laying vessel availability and manufacturing capacity for specialised cable systems are both finite resources
A facility with abundant power and poor connectivity is not actually power-rich in any useful sense — it is a well-powered building that struggles to deliver its compute capacity to the people who need it.
Resilience Increasingly Means Network Resilience Too
As discussions of data center resilience have rightly focused on power redundancy and cooling failover, network resilience deserves comparable attention. A facility with flawless power redundancy but a single point of network failure remains vulnerable to an outage that, from a user's perspective, is indistinguishable from a power failure — the service is simply unavailable. Comprehensive resilience planning increasingly needs to treat network path diversity with the same rigour traditionally reserved for electrical and mechanical redundancy.
Implications for Facility Geography
For developers and investors, this argues for site selection processes that weigh network topology with genuine rigour alongside power availability, rather than treating connectivity as a secondary consideration to be addressed after a site is otherwise selected. In markets where multiple candidate sites offer broadly comparable power availability, network topology quality can be the deciding factor in long-term site value and tenant attractiveness.
DATAPERT incorporates network topology assessment into our feasibility studies and broader data center development advisory. Start a project to discuss connectivity strategy for your next site.
