Hi ,
>>在我了解应该是在首选DNS服务器无法解析的情况下才去向备用DNS服务器发送请求，而不是现在的同时发送。
正常情况就应该是首选DNS不响应客户端的查询时，客户端才使用列表中的备选DNS服务器重试该查询。
所以同时向首选和备选DNS发送请求的现象在windows 10中是不正常的现象。你可以更换其他的客户端看一下解析的记录是否正常。
关于客户端DNS解析的顺序，可以参考以下的官方文档：
The DNS Client service queries the DNS servers in the following order:
- The DNS Client service sends the name query to the first DNS server
on the preferred adapter’s list of DNS servers and waits one second for a response.
- If the DNS Client service does not receive a response from the first DNS server within one second, it sends the name query to the first DNS servers on all adapters that are still under consideration and waits two seconds for a response.
- If the DNS Client service does not receive a response from any DNS server within two seconds, the DNS Client service sends the query to all DNS servers on all adapters that are still under consideration and waits another two seconds for a response.
- If the DNS Client service still does not receive a response from any DNS server, it sends the name query to all DNS servers on all adapters that are still under consideration and waits four seconds for a response.
- If it the DNS Client service does not receive a response from any DNS server, the DNS client sends the query to all DNS servers on all adapters that are still under consideration and waits eight seconds for a response.
NET: DNS: DNS client resolution timeouts
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此致
Candy
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