The TCP/IP Guide http://www.tcpipguide.com/free/t_toc.htm 我所看過最全的免費線上版網路書，難能可貴的是可以用短短幾頁將每個主題說明清楚，萬分拜服
以下是 IPv6 相關章節 Internet Protocol Version 6 (IPv6) / IP Next Generation (IPng) **IP Security (IPSec) Protocols** **Internet Control Message Protocol (ICMP/ICMPv4 and ICMPv6) **TCP/IP IPv6 Neighbor Discovery Protocol (ND) **TCP/IP Routing Protocols (Gateway Protocols)
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