Hi Shane
Sure, they route googlemail.l.google.com. to nearest datacenter but when
prevents them from doing same with mail.google.com instead?
They return Geographically closer A record for googlemail.l.google.com. but
why not for mail.google.com itself?
Thanks.
On Sat, Jun 4, 2016 at 10:31
My guess is the *.l.google.com runs on a separate geo-ip aware backend DNS
cluster rather than *.google.com, even though the authoritative public dns
records are ns[1-4].google.com
C:\>dig www.gmail.com @ns1.google.com
;; QUESTION SECTION:
;www.gmail.com. IN A
;; ANSWER SECT
A single query to the Google DNS server does return the CNAME - but it also
gives the results to the CNAME. Which means, from the single packet reply,
you get back the A or that you asked for.
Are we really concerned over a few extra bytes?
The fact that Google exposes the CNAME at all is ju
