Which three statements are true about the Internet Group Management Protocol (IGMP)? （）

• 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