Why supplement passive discovery with a physical walk-down of control cabinets?
- A.It replaces passive monitoring after the first full audit cycle
- B.It finds powered-off devices missing from monitored switches
- C.It lets technicians update firmware while surveying cabinets
- D.It measures protocol latency between field controllers
Why B is correct
Passive tools see only devices that transmit across monitored links. A walk-down records dormant spares, standalone relays and islands that never touch a mirrored port.
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