This read-write enumerated value reports whether this name binding entry's status is active(1) or invalid(2), the health/validity indicator for the binding. An invalid status likely results from a stale registration, a conflicting duplicate, or an underlying port/node issue, and distinguishes a healthy currently-usable binding from one that exists in the table but shouldn't be relied upon. An engineer auditing name bindings for a network migration would filter out entries where nameStatus reports invalid(2) before treating the remaining active(1) entries as the authoritative current registration set.