Final answer:
Non-Microsoft OSes use alternatives such as ISATAP, 6rd, and 6in4 instead of Teredo.
Step-by-step explanation:
Non-Microsoft OSes use various alternatives to Teredo, which is a transition technology used by Microsoft operating systems to enable IPv6 communication over IPv4 networks. One common alternative is ISATAP (Intra-Site Automatic Tunnel Addressing Protocol), which allows IPv6 addresses to be encapsulated within IPv4 packets. Another alternative is 6rd (IPv6 Rapid Deployment), which is an encapsulation mechanism that allows IPv6 packets to be transmitted over an IPv4 infrastructure using automatic tunneling. Lastly, 6in4 (IPv6-in-IPv4) is another option where IPv6 packets are encapsulated within IPv4 packets, providing connectivity between IPv6 networks over an IPv4 infrastructure.