1. DNS/HTTPS
Contents
https://developer.mozilla.org/en-US/docs/Glossary/HTTPS_RR
HTTPS RR (HTTPS Resource Records) are a type of DNS record that delivers configuration information and parameters for how to access a service via HTTPS.
https://developers.google.com/speed/public-dns/docs/dns-over-https#introduction
https://dns.google.com/resolve?name=qmail.jp&type=ns
JSON
{"Status": 0,"TC": false,"RD": true,"RA": true,"AD": false,"CD": false, "Question":[ {"name": "qmail.jp.","type": 2}], "Answer":[ {"name": "qmail.jp.","type": 2,"TTL": 21599,"data": "a.ns.qmail.jp."},{"name": "qmail.jp.","type": 2,"TTL": 21599,"data": "B.ns.qmail.jp."}], "Comment": "Response from 14.192.44.5"}
https://news.ycombinator.com/item?id=17222861 Inside Firefox’s DNS-over-HTTPS engine (haxx.se)