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Event ID: 11050 Source: DNSCache

Source
Level
Description
The DNS Client service could not contact any DNS servers for a repeated number of attempts. For the next 30 seconds the DNS Client service will not use the network to avoid further network performance problems. It will resume its normal behavior after that. If this problem persists, verify your TCP/IP configuration, specifically check that you have a preferred (and possibly an alternate) DNS server configured. If the problem continues, verify network conditions to these DNS servers or contact your network administrator.
Comments
 
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).

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