Enterprise learning center

Learn the terms before you buy the circuit

Understand DIA, BGP, IRUs, DCI, dark fiber, wavelengths, NNIs, and interconnection points before choosing a route, handoff, or support model.

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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. Hardened last mile A planned premises access route with documented entrance, cabinet handoff, route, access points, and interconnection targets. Splice point A planned place where fiber can be joined, branched, repaired, or connected to another route segment. Access point A planned handhole, cabinet, pole, splice case, or facility point where the fiber route can be reached later. Meet-me point A planned location where networks, providers, or customer routes can physically hand off or interconnect. Carrier diversity Use of separate carriers, routes, entrances, handoffs, or upstream paths to reduce single-path dependency. Redundancy A design that keeps service working through a planned second path, provider, handoff, entrance, route, or routing option. Lateral redundancy A second local path, entrance, conduit, pole route, or provider path between a customer site and the larger network. Protected route A route designed with a planned backup path, optical protection, routed failover, alternate entrance, or dual handoff.
View full glossary

Explore the terms

Topics are grouped by the layer of the design they affect. Each page gives a plain-language definition, where it fits, what to ask before quoting, the related commercial service, and the next request path.

Fiber and physical routes

Outside plant, premises access, route rights, diversity, and the physical paths underneath a service.

Metro / Regional Laterals Custom route segments from customer sites to Quad State Internet hubs, meet points, IX ports, transport corridors, and redundant paths. Hardened Last Mile A planned premises access route that connects the building to the right network, carrier hotel, meet point, or interconnection path. Splice / Access / Meet-Me Planned physical places where fiber can be spliced, accessed, handed off, or extended later. Carrier Diversity Route separation, alternate entrances, lateral redundancy, 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. 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.

Transport and capacity

Private Layer 2 and optical paths, interface speeds, capacity models, and facility-to-facility connectivity.

Transport Private connectivity that moves traffic between places without treating the path like ordinary Internet access. 100G / 400G Paths High-capacity private handoffs for AI, cloud, content, research, healthcare, public sector, manufacturing, and backbone traffic. 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. Data Center Interconnect Private connectivity between data centers or colocation facilities, with related facility-interconnect paths available to other network locations.

Internet and routing

Internet access, transit, ASNs, BGP policy, addressing, and partner-delivered access.

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, including redundant designs. 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.

Interconnection and facilities

Equipment locations, physical cross-connects, carrier handoffs, exchanges, meet points, and expansion sites.

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. 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 and backbone strategy

Cloud-adjacent paths and the multi-service design that connects sites, carriers, exchanges, and recovery locations.

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.