RFC 文档RFC 6333 - Dual-Stack Lite Broadband Deployments Following IPv4 Exhaustion5.7 Well-Known IPv4 Address (知名 IPv4 地址)本页总览5.7 Well-Known IPv4 Address (知名 IPv4 地址)5.7 Well-Known IPv4 Address (知名 IPv4 地址) 此兼容页面用于保留 RFC 6333 小节链接. 本小节内容已合并在 5. B4 Element (B4 元素).