This reports the sequence number of the most recent trap sent to this destination, drawn from a 32-bit wrapping counter that increments with each trap sent to that destination. An admin's management station compares this value against the sequence numbers embedded in received traps to detect gaps, which would indicate that one or more traps for this destination were lost in transit. For example, if a manager last recorded sequence number 100 from received traps but this object now reads 105, the manager can infer that traps 101 through 104 were likely lost.