A.UnicastB.PublicC.MulticastD.Anycast
A.2031:0:720C:0:0:9E0:839A:130B B.2031:0:720C:0:0:9E:839A:130B C.2031::720C::9E:839A:130B D.2031:0:720C::9E0:839A:130B
A.由于6to4協(xié)議對(duì)IPv4路由沒有影響,該協(xié)議在IPv4中不會(huì)引起路由環(huán)路 B.如果IPv6包的MTU超過了IPv4包的MTU,那么該IPv6包會(huì)在6to4路由器上丟棄 C.6to4路由器可能不會(huì)返回包含“unreachable”消息的ICMPv6報(bào)文到源端的IPv6節(jié)點(diǎn) D.存在于6to4邊界路由器上的防火墻和NAT通常不會(huì)影響6to4的機(jī)制