多项选择题
Which two tunneling techniques in IPv6 do not require an IPv4 tunnel destination in the configuration？（）
A.6to4 B.6over4 C.ISATAP D.GRE
多项选择题 WhichtwoofthefollowingareconsideredvalidrouterIDsforEIGRPv6？（）
多项选择题 WhichtwoIPv6addresspairscanbeassignedonapoint-to-pointlinkwitha/125mask？（）
多项选择题 WhichthreecausescouldpreventahostfromgettinganIPv6addresswithstatelessautoconfiguration？（）
