IPv6 was designed as a replacement for IPv4 which has been in use since 1982, and is in the final stages of exhausting its unallocated address space, but still carries most Internet traffic.
IPv6是为了替代自1982年以来一直在使用的IPv4而设计的，并正处于耗尽未分配地址的最后阶段，但仍然传输着大多数的互联网流量。