多项选择题
A. end-to-end communications path
B. hosts on the same Layer 2 broadcast domain
C. hosts on the same Layer 3 broadcast domain
D. routing information on participating Layer 3 devices
单项选择题 Which source of routing information is preferred by default?（）
单项选择题 Which routing table stores IPv4 unicast routes and is used by multicast routing protocols to prevent loops?（）
多项选择题 Which two statements are correct when you use the reject parameter as the next-hop value for a static route?（）