MQTT is a machine-to-machine (M2M)/”Internet of Things” connectivity protocol.
The JenNet-IP protocol combines IEEE802.15.4-based wireless network technology and the Internet Protocol (IP) to achieve integration between the two domains, providing a solution for the wireless ‘Internet of Things’.
Thread Networking Protocol is an IPv6-based, closed-documentation (paid membership required for access to specifications) royalty-free networking protocol for Internet of Things (IoT) “smart” home automation devices to communicate on a local wireless mesh network.
Thread uses 6LoWPAN, which in turn uses the IEEE 802.15.4 wireless protocol with mesh communication, as does ZigBee and other systems. Thread however is IP-addressable, with cloud access and AES encryption. It currently supports up to 250 devices in one local network mesh.