An administrator connected a new server to a Cisco MDS 9222i on Port FCL/20, but did not capture the world wide node name of the host bus adapter Which command returns the needed information?

'show wwn status' displays the WWN block allocated to the MDS switch itself, not the WWNs of externally connected host bus adapters.

'show interface fc 1/20' displays interface counters, link state, speed, and physical statistics but does not report the WWNN of the attached device.

When a host bus adapter connects to an MDS port and performs a Fabric Login (FLOGI), the switch records the device's WWNN and WWPN in the FLOGI database indexed by the physical port. Running 'show flogi database' displays all logged-in devices and their WWNs per interface, so filtering by fc1/20 directly reveals the WWNN without requiring physical access to the server or prior documentation.

'show fcs database' queries the Fabric Configuration Server for inter-switch fabric topology information, not per-port HBA WWNs.