4.5 Round robin

If your rr table contains more than one address record for the same name (but with different addresses, of course), MyDNS will serve them up in a random order each time.

Round robin is used only if all the address records found have an aux value of `0'. If any of the records have an aux value that is non-zero, load balancing will be used instead. (See section 4.6 Load balancing.)

Note that MyDNS will also return multiple same-preference MX records in random order, to help equalize the load among same-preference MX hosts.