https://example.com/ example.com. IN HTTPS 1 svr.example.com. ; svr.example.com. IN A 192.0.2.1 ; IP IN AAAA 2001:db8::1 example.com. IN A 192.0.2.1 ; IP IN AAAA 2001:db8::1 ; CDN cdn.example.net. IN HTTPS 10 sv1.example.net. alpn=h3,h2 ech=abc … IN HTTPS 20 sv2.example.net. alpn=h3,h2 ech=xyz … sv1.example.net. IN A 192.0.2. 1 sv2.example.net. IN A 192.0.2.2 https://example.com/ ; Web CDN example