Is IPv6 default?

[frankabagnale]

Say I set up a server that:

• Is dual stack
• Has an A record and a AAAA record pointing to it

Then I tell people the DNS name to connect to it. Will it attempt to use IPv6 first or IPv4?

[Rseding91]

I would guess ipv4; but we don't explicitly tell the operating system which one should be used. We just give it a host name and say "hey what's the IP for this?" through calling getaddrinfo(...) with ai_family = AF_UNSPEC