多项选择题
A. There are three IGMP modes: dense mode, sparse mode, and sparse - dense mode
B. IGMP is used to register individual hosts with a multicast group
C. IGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic from
D. IGMP messages a re IP datagrams with a protocol value of 2, destination address of 224.0.0.2, and a TTL value of 1
E. IGMP is a multicast routing protocol that makes packet - forwarding decisions independent of other routing protocols such as EIGRP
F. IGMP snooping ru ns on Layer 3 routers
单项选择题 When IP multicast is enabled via PIM, which mode uses the flood and prune metho d? Select the best response.（）
单项选择题 Which enhancement w as added to IGMP version 3?（）
单项选择题 When building an IP multicast domain using PIM which mode assumes that other routers do not want to forward multicast packets for the group?（）