DNS over TLS (DoT) is nothing but an encrypted DNS protocol. It is considered an alternative to DNS over HTTPS (DoH). In DoH, the DNS traffic is nothing but another HTTS data stream over port 443. On the other hand, DNS over TLS specifies the port number 853 for the purpose of encrypting DNS traffic allowing it to run over a TLS tunnel without the need for HTTP layering underneath. This makes DoT more superior and an improvement over DoH.