A.IPv6 prefixes B.link-local addresses C.solicited node multicast addresses D.IPv6 prefixes and topology information
A.priority queue B.weighted fair queues C.round-robin service of output queues D.LLQ
A.An IPv4-compatible tunnel is a static tunnel, but an 6to4 tunnel is a semiautomatic tunnel. B.The deployment of a IPv4-compatible tunnel requires a special code on the edge routers, but a 6to4 tunnel does not require any special code. C.An IPv4-compatible tunnel is typically used only between two IPv6 domains, but a 6to4 tunnel is used to connect to connect two or more IPv6 domains. D.For an IPv4-compatible tunnel, the ISP assigns only IPv4 addresses for each domain, but for a 6to4 tunnel, the ISP assigns only IPv6 addresses for each domain.