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Upstream servers...
rjbarlow
Hello techies,
studying DNS, some time I encountered these "upstream servers" in some question (often they was the wrong answer), but I don't know in fact what they mean for.
Someone can clarify this to me please?
Thank You.
rj
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dynamik
Basically, those are just DNS servers which provide information to a client or another DNS server.
ISP
|
1
/ | \
2 3 4
So for 2, 3, and 4, 1 and ISP would be upstream of them. ISP would be upstream of 1. Conversely, 2, 3, 4 would be downstream of 1 and ISP. It depends on your hierarchy and forwarding options.
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