DNS/RFC/7858について、ここに記述してください。
https://tools.ietf.org/html/rfc7858 May 2016
Specification for DNS over Transport Layer Security (TLS)
Abstract
This document describes the use of Transport Layer Security (TLS) to provide privacy for DNS. Encryption provided by TLS eliminates opportunities for eavesdropping and on-path tampering with DNS queries in the network, such as discussed in RFC 7626. In addition, this document specifies two usage profiles for DNS over TLS and provides advice on performance considerations to minimize overhead from using TCP and TLS with DNS.