3G   Third-generation wireless data standard for cell phones and other mobile devices. 3G matured over time until Evolved High-Speed Packet Access (HSPA+) became the final wireless 3G data standard. It transferred at theoretical maximum speeds up to 168 megabits per second (Mbps), although real-world implementations rarely passed 10 Mbps.

4G   Most popularly implemented as Long Term Evolution (LTE), a wireless data standard with theoretical download speeds of 300 Mbps and upload speeds of 75 Mbps.

4to6   Internet connectivity technology that encapsulates IPv4 traffic into an IPv6 tunnel to get to an IPv6-capable router.

6in4   An IPv6 tunneling standard that can go through IPv4 Network Address Translation (NAT).

6to4   An IPv6 tunneling ...

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