4 ms·
https://en.wikipedia.org/wiki/Happy_Eyeballs https://en.wikipedia.org/wiki/Happy_Eyeballs Browsers even try other IPs and alternate between IPv4 and IPv6 befor
by duncaen 7y ago
https://en.wikipedia.org/wiki/Happy_Eyeballs https://en.wikipedia.org/wiki/Happy_Eyeballs
Browsers even try other IPs and alternate between IPv4 and IPv6 before the connection is established.
- sneak 7y agoI know all about this, but most websites only support v4, and I don’t think this is used in any way for choosing which A record to use.
- duncaen 7y agoMost websites don't have redundant servers but its still there and used by a lot of big sites. The whole point of it is to connect to multiple A and AAAA records with a very short delay (250ms in chrome). The browsers use poll to get notified about the first established connection and then use it. So if one A/AAAA records IP is unreachable or slow it will use a another one. There will be no fallout (except maybe for clients that don't use something like happy eyeballs, but any browser does that) if you have multiple A/AAAA records and one of them is down.