hi,
A recursive name server A receives a recursive query from a client,but the
authoritative name server B for the query zone is dead. So name server A return
a server failure answer to the client.
I want to konw if name server A send a query to name server B when another
client ask the same domain of the zone.
In other words my question is if the name server cache server failure
infomation.
Best Regards,
liuqiang
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