I use DNS Jumper to test the speed of various DNS and this is the result:
Primary: 203.144.207.29 (39 ms)
Secondary: 8.8.4.4 (71 ms)
Primary: 208.67.220.220 (315 ms)
Secondary: 208.67.222.222 (307 ms)
Theoretically I should stick to setting (A) as they are faster.
But when I use setting (A), access to www.taobao.com (a shopping site in mainland China) is extremely slow although still accessible. For other sites around the world they are fast.
I repeated my test many times and it seems that setting (B) is much faster ONLY for www.taobao.com .
I cannot understand this. Why is setting (B) faster than (A) when both DNS servers are not down. Isn't DNS just address-lookup? Why setting (B) gives me faster download when the DNS speed test is much slower?
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