County assessor IT wants to refresh top-of-rack switches without redesigning every agency VLAN. Which SDDC idea should the candidate identify?
Select an answer to reveal the explanation.
Short Explanation
Refresh the closet switches without redrawing every agency map. The overlay is the map; the underlay is just the road. Swap the road, keep the map.
Full Explanation
An overlay decouples virtual network topology from a specific physical switch and VLAN layout so hardware refresh need not redesign every tenant network. County assessor IT can refresh top-of-rack switches while agency overlay networks remain software objects on the new underlay, provided transport nodes and underlay IP/MTU are prepared. Redesigning every agency VLAN whenever a ToR serial changes is the traditional coupling overlays remove. Hardware refresh only after moving apps to Horizon is unrelated. Permanently tying each agency network to a specific physical switch port blocks mobility and refresh. Exam caveat: underlay VLANs for VTEP uplink or VLAN-backed segments may still need planning, but tenant overlay topology should not be rewritten for every ToR swap. Operational check: during a ToR refresh pilot, migrate assessor test VMs and confirm the same overlay segment identity and IP plan remain valid without redesigning agency VLAN maps. Keep municipal naming and change tickets aligned with the software objects so civic audits can trace intent. Prefer verifying with a non-production agency workload before promoting the same pattern to life-safety systems. Record realization state and underlay health in the runbook used by on-call city operators.