This read-write TestAndIncr object tracks a counter that increments with each successful SNMP set operation performed against the terminal, letting a manager verify its writes are actually being applied. A network management application reads the current value, includes it in its next set request, and expects it to match before proceeding, which prevents two managers from unknowingly overwriting each other's changes. For example, if two operators are both about to reconfigure a link, one manager's set will fail if wvSetOperationId has already been incremented by the other's change in between.