RFC 9952 and RFC 9953 published
DNS over CoAP (RFC 9953, proposed IETF standard) and Application-Layer Protocol Negotiation (ALPN) ID for CoAP over DTLS (RFC 9952, informational) have finally been published as RFCs.
DoC allows for encrypted and segmented DNS resolution on the constrained IoT. This includes transports such as UDP, DTLS, Bluetooth GATT, Thread, and much more. RFC 9952 provides the numbers to discover DoC servers via DHCP, DNS, and more. This is the result of five years work at the Internet Engineering Task Force (IETF).