This Counter32 object counts good packets received by a port that are addressed to a unicast address. An admin baselining normal traffic patterns on a switch port uses this counter, together with the broadcast and multicast counters, to understand what proportion of traffic is direct point-to-point communication. For example, an admin comparing this counter's growth rate against rxBroadcastPkts would confirm a server port's traffic is overwhelmingly unicast, as expected for normal client-server communication.