18 Jun
2011
18 Jun
'11
2:19 p.m.
Not really. A AAAA record adds 28 octets (a A record takes 16). Unless you have a lot of name servers most referrals still fall within 512 octets additionally most answers also still fall withing 512 octets.
1. Most != All even in IPv4 (ran into this in a few hotels with some prominent MMORPG login sites) 2. 512/16 = 32, 512 / 28 = 18 (the 19th record will TRUNC). So, you get just over half the number of records to fit within the same space. I would say that my statement that you are much more likely to encounter TRUNC results and need a TCP query with IPv6 stands. It also matches my experience. Owen