A city links its primary data center to a DR data center with dark fiber and must classify that path for a JNCIP-DC DCI design review. Which interconnect network type does dark fiber represent?
Select an answer to reveal the explanation.
Short Explanation
Think of dark fiber as the raw pipe between buildings, not a finished bus route. It is a physical interconnect type you can dress up with L2, L3, or overlays. Calling it "Internet-only" or "just another leaf-spine link" misses what DCI interconnect types actually are.
Full Explanation
Data Center Interconnect concepts begin with the interconnect network type itself. Dark fiber is a physical optical path between sites and can underpin native Layer-2 services, routed Layer-3 handoffs, or overlay-based DCI such as EVPN-VXLAN over IP. It is not inherently limited to Internet transit, nor is it the same as an intra-fabric leaf-spine link. Correct classification drives which stretch and encapsulation models are feasible.