While a lot of people debate DNS-over-https (and it’s dependencies), IETF has a specification for DNS-over-QUIC on it’s standards track.
This document describes the use of QUIC to provide transport privacy for DNS. The encryption provided by QUIC has similar properties to that provided by TLS, while QUIC transport eliminates the head-of-line blocking issues inherent with TCP and provides more efficient error corrections than UDP. DNS over QUIC (DNS/QUIC) has privacy properties similar to DNS over TLS specified in RFC7858, and performance similar to classic DNS over UDP.
Zigbee is a wireless protocol for applications not requiring lots of bandwidth, e.g. home automation, lighting or sensor networks. The idea is to create so called Personal Area Networks. The specification is standardized as IEEE 802.15.4.
Dresden Electronic offers the Rasbee (Picture to the left) to get started with low budget Raspberry Pi Hardware.
Just learned. There is a protocol by the name of 6LoWPAN, which is short for IPv6 over Low power Wireless Personal Area Networks. It is a current IETF working group and aims to provide capabilities to devices participating in the Internet of Things.