On Wed, Apr 4, 2012 at 7:21 AM, james hedley <[email protected]> wrote: >> >> Iirc the number of outgoing connections is browser dependent > > Yeah in fact in Firefox you can specify it, the default is somethign like > 15.
MSIE and all others are capable of many parallel connections, the limitation was always imposed PER HOST, eg MSIE < 8 (maybe 7) could only open 2 connections per hostname, but you could still open 8+ connections if you used 4+ hosts. a simple way to achieve this, for one server, is to create multiple DNS entries for the same machine. create one A record, then create 4 varying CNAMEs; research had previously shown that more than 4 hosts was negatively affected by DNS lookup times. this is the main reason you often see img0.server.com or static0.server.com (and the fact that it could be a CDN, but that's unrelated, same effect) -- C Anthony
