[Sergius]

This occurs when there are connectivity problems between the a workstation and the DNS servers configured on its TCP/IP protocol. The DNS Client service is basically reporting that for 30 seconds will not attempt to connect to them (but the servers may become available before that!). If this is not acceptable, one can stop the DNS Client Service (and eventually configure it start manually). It is only used to cache DNS requests (and avoid consuming bandwitdh for repetitive DNS requests to the same host).