IPv6地址 ■Network ID ▣64位，全球地址管理IANA ■Host ID configured manually or auto-configured Figure 2-1 IPv6 Unicast Network and Host ID Format Network ID Host ID XXXX:XXXX:XXXX:XXXX:YYYY:YYYY:YYYY:YYYY 64 Bits 64 BitsIPv6地址 ◼ Network ID 64位，全球地址管理IANA ◼ Host ID configured manually or auto-configured