On 21 Aug 2014, at 1:28 am, Phillip Hallam-Baker <phill@xxxxxxxxxxxxxxx> wrote: It is now possible to make a complicated DNS discovery request for the same latency cost as traditional A record look up: Traditional query: example.com ? A Complex discovery example.com ? A example.com ? AAAA _http._tcp.example.com ? SRV _http._tcp.example.com ? POLICY _80.example.com ? TLSA Just to weigh in solely on your example here. I don't believe it makes complete sense to query A/AAAA records for example.com at that point. Until the SRV record has been queried you can't know what server the http protocol is handled by. Or is this a form of collateral where that query takes place to quicken legacy lookups? (Those lacking SRV records). Apologies if any of this is off track at all. Tom Thorogood. |