Enterprise learning center

Learn the terms before you buy the circuit

Enterprise connectivity can sound like alphabet soup: DIA, BGP, IRU, Type II, DCI, dark fiber, wavelengths, NNIs, and interconnection points. This guide explains what each one means, when it fits, and what information helps Quad State Internet route the request correctly.

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How to explore this

Start with the outcome, not the acronym. Tell us what locations need to talk, what traffic matters, whether you need Internet or private transport, and which interconnection points or carriers matter. We can translate that into DIA, IP Transit, dark fiber, wavelengths, Type II access, carrier handoff, or a custom backbone build.

1. Define the places

List endpoints, facilities, carrier meet points, IX ports, cloud on-ramps, or markets you need to reach.

2. Define the traffic

Internet access, private site-to-site traffic, BGP, replication, cloud exit, peering, or backbone transport all point to different answers.

3. Define control

Choose between a managed service, dedicated capacity, dark fiber, or an IRU depending on how much control you need.

4. Define support

Quad State Internet can build, light, monitor, document, and support the backbone so you are not alone after turn-up.

Glossary quick scan

A compact glossary for the words people run into when exploring enterprise connectivity, routing, interconnection, and private backbone design.

Colocation Customer equipment placed in a shared network facility with power, support, and interconnection options. Cross-connect A physical connection between two parties in a meet point or colocation environment. Transport Private connectivity between locations, facilities, meet points, IX ports, or cloud paths. Metro lateral A custom route segment connecting a customer location into a larger network path or hub. Carrier diversity Use of separate carriers, routes, entrances, handoffs, or upstream paths to reduce single-path dependency. Protected route A route designed with a planned backup path, optical protection, routed failover, alternate entrance, or dual handoff. Unprotected route A single working path where interruption usually waits for repair or manual reroute. 100G / 400G path A high-capacity private service planned around optical transport, handoff speed, route, and growth. Private WAN A private multi-site network using transport, routing, optical services, or a custom backbone. Paducah IX A regional exchange ecosystem in Paducah where participating networks can connect and exchange traffic. Server hosting Regional server capacity with connectivity, support, and proximity to interconnection options. Expansion site A network-adjacent site planned for edge, cloud-adjacent, content, processing, or backbone growth.
View full glossary

Explore the terms

Each page gives you a plain-language definition, where the service fits, what to ask before quoting, and related concepts to keep exploring.

Colocation Space, power, cross-connects, and hands-on support for customer equipment inside a network facility. Cross-connects Private physical interconnections between customer equipment, carriers, IX ports, and transport providers. Transport Private connectivity that moves traffic between places without treating the path like ordinary Internet access. Metro / Regional Laterals Custom route segments from customer sites to Quad State Internet hubs, meet points, IX ports, and transport corridors. Carrier Diversity Route separation, alternate entrances, and carrier mix for organizations that cannot depend on one provider path. Protected / Unprotected Routes The tradeoff between a single working path and a service designed with protection, diversity, or automatic failover. 100G / 400G Paths High-capacity private handoffs for AI, cloud, content, research, healthcare, public sector, manufacturing, and backbone traffic. Dark fiber Unused fiber strands or fiber pairs reserved for your own equipment, route, and capacity plan. IRUs A long-term right to use fiber, route segments, or lit capacity without buying the entire physical asset. Wavelengths High-capacity optical channels, often 10G, 100G, or 400G, delivered over a fiber path. Private Ethernet A private Layer 2 path between locations, delivered as Ethernet instead of public Internet. Private WAN Layer 2, Layer 3, and optical services for connecting offices, campuses, production sites, and critical systems. DIA Business Internet with dedicated bandwidth, static IPs, routing support, and a clear upgrade path. IP Transit Carrier-grade Internet connectivity for networks that need to reach the global Internet through routing handoffs. ASN An Autonomous System Number identifies a network that controls its own routing policy. BGP The routing language networks use to tell each other where traffic should go. Type II / Off-Net Partner-carrier access for places outside the direct Quad State Internet fiber footprint. DCI / Facility Interconnect Private connectivity between colocation footprints, carrier meet points, IX ports, cloud on-ramps, and enterprise facilities. Carrier Handoff / NNI The physical and logical place where Quad State Internet connects with another network or carrier. Paducah IX A regional exchange point where participating networks can connect and keep traffic on practical local paths. Interconnection Points Places where networks meet to exchange traffic, buy transit, reach cloud platforms, or connect private paths. Server Hosting Regional server capacity with connectivity, support, and proximity to Quad State Internet interconnection options. Expansion Sites Network-adjacent locations for edge, AI, cloud, content, processing, and private backbone growth. Cloud Exit Paths Private connectivity for organizations moving workloads back into owned or colocated infrastructure while keeping scale. Private Backbone A private network spine that connects your sites, carriers, cloud paths, and interconnection points.