23. Upstream1* Upstream2* Upstream1* Upstream2* Upstream1* Upstream2*
IPv4/v6*Dual*
IPv4* IPv6*
IPv4/v6*Dual*
IPv4 IPv6
IPv4 User IPv6 User IPv4 User IPv6 User IPv4 User IPv6 User
47. www.example.com. IN A 192.0.2.1
IN AAAA 2001:db8::1
mail.example.com. IN A 192.0.2.1
IN AAAA 2001:db8::1
2001:4860:b006::93
http://[2001:4860:b006::93 ]:80/