Is it possible that one domain name has multiple corresponding IP addresses?

Question

For example, when we connect to `www.example.com`, at first we try to connect to `192.0.2.1`. And if first try fails, then we try `192.0.2.222`. Is it possible? Can we register multiple backup IP addresses for one domain name?

Accepted Answer

This is round robin DNS. This is a quite simple solution for load balancing. Usually DNS servers rotate/shuffle the DNS records for each incoming DNS request. Unfortunately it's not a real solution for fail-over. If one of the servers fail, some visitors will still be directed to this failed server.

Is it possible that one domain name has multiple corresponding IP addresses?

Solution

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