DNS-over-QUIC (DoQ)
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DNS-over-QUIC (DoQ, RFC 9250) is a privacy-preserving DNS transport that runs DNS queries over the QUIC protocol on UDP port 853. QUIC provides built-in encryption (TLS 1.3), multiplexing without head-of-line blocking, and faster connection establishment than TCP-based alternatives like [[dns-over-tls|DoT]]. DoQ offers lower latency than [[dns-over-https|DoH]] for bulk queries and is particularly advantageous on mobile networks where connections frequently change.
Example
AdGuard DNS supports DoQ at `quic://dns.adguard.com` — compatible clients can resolve names with TLS 1.3 encryption and QUIC's 0-RTT reconnection speed.