This guide describes the Dual Stack Lite (DS-Lite), Lightweight 4over6 (Lw4o6), and MAP-E technologies. As IPv4 and IPv6 networks are not directly inter-operable, these technologies are used as transition mechanisms to permit hosts on either network type to communicate with any other host. Transition mechanisms bridge between IPv4 and IPv6 and allow the two versions to work side by side.

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