ON THE outskirts of Columbia, South Carolina's capital, lies a rolling swathe of farmland where cattle graze, tomatoes sprout and razor wire glints in the afternoon sun.
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描述在与IPv 4网络共存情况下实施IPv6的技术要求(包括协议放式,双栈方式,隧道方式)。
Describe the technological requirements for running IPv6 in conjunction with IPv4 (including: protocols, dual stack, tunneling, etc).