Data Center Fiber & Connectivity
In the 19th century, towns lived or died by the railroad. In the data center era, the equivalent is fiber-optic connectivity. Power lets a data center run; fiber lets it matter. A facility with abundant power but poor connectivity is a generator looking for a purpose.
Dark Fiber
Dark fiber is fiber-optic cable that has been laid but is not yet "lit" with active equipment — spare capacity in the ground. Access to dark fiber lets an operator light its own dedicated, high-capacity connections without waiting for a carrier to build new routes. Sites near abundant dark fiber can scale bandwidth quickly and cheaply.
Long-Haul Networks & Carrier Hotels
Long-haul fiber networks carry traffic between cities and regions, and proximity to multiple routes gives a data center diverse, high-capacity paths to the rest of the internet. These routes often parallel highways, rail, and pipeline corridors. A carrier hotel is a major interconnection facility where many networks meet; being on a route to one improves connectivity options and reduces the cost of reaching many networks at once.
Redundancy
Mission-critical facilities need redundant, physically diverse fiber paths so a single cut — a backhoe, a storm — cannot sever the site. Multiple carriers entering from different directions, along separate rights-of-way, is the gold standard. Connectivity redundancy sits alongside power redundancy as a core reliability requirement.
Latency: Training vs. Inference
Latency — the delay for data to travel to and from the facility — is critical for some workloads and nearly irrelevant for others. AI training is largely latency-tolerant, so training campuses can sit far from population centers in power-rich areas. Inference, real-time applications, financial trading, and interactive services are latency-sensitive and pull capacity closer to users. Matching a site's connectivity and location profile to the intended workload is part of good site selection.
Where Power and Fiber Cross
Power and fiber both follow corridors — highways, rail, rivers, and pipelines — because that is where rights-of-way already exist. The best data center sites tend to sit where a power corridor and a fiber corridor cross. Brownfields often sit precisely at those crossings, because heavy industry located there for the same reasons — another argument for the powered-land thesis.
Frequently Asked Questions
What is dark fiber?
Why is fiber connectivity important for data centers?
What is a carrier hotel?
What is latency and why does it matter?
What is fiber redundancy?
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Educational information only — not legal, tax, engineering, or investment advice.
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