A county can connect its two data centers only over a routed IP WAN with no native Layer-2 metro service. Which DCI implication follows for model selection?
Select an answer to reveal the explanation.
Short Explanation
If the only road between halls is a routed IP WAN, you do not get a free Layer-2 bridge. Overlay or L3 DCI rides that IP path; native VLAN stretch needs a real L2 handoff. Plan the model for the road you actually have.
Full Explanation
When only a routed IP WAN exists between data centers, there is no native Ethernet adjacency to stretch VLANs across. Designs therefore favor Layer-3 DCI or VXLAN/EVPN overlays transported over IP between border devices. Assuming native L2 stretch, merging underlay ASNs casually, or declaring DCI impossible misreads IP-only interconnect constraints on JN0-683 DCI objectives.