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DNS0
DNS2
DNS1
DNS3
Internet/Customer
When a DNS* server doesn't have the answer cached
it could use a 2bit hash value to select a server.
fast interconnect
DNS0
DNS2
DNS1
DNS3
PowerLoadBalancer
The PowerLoadBalancer decides with a 2bit (in this example)
hash value over the domainname which server is to ask.
Probably it would be possible for the DNS server to answer directly to
the clients.
fast interconnect
Internet/Customer