You I want to ask the teacher, watching the IGMP, recently found it mentioned in the query, query router IP 224.0.01 as purpose, the query message broadcast out, here I want to ask is how to realize the broadcasting, I went to check, online, said 224.0.0.1 is the inside of the multicast address for all the host, I would like to ask can I understand for the broadcast the whole message quite so on IP layer, the destination address is written 224.0.0.1, in destination MAC MAC layer is F, so to broadcast, if so, I also want to ask, if I will be written in IP layer destination IP query router can query the network segment of the radio address, such as the corresponding 192.168.1.1 segment of an interface, the query router I written in the destination IP can't 192.168.1.255, such implementation radio and I fill in 224.0.0.1 achieve radio, what's the difference

CodePudding user response:

Thank you inquire inquire

CodePudding user response:

MAC layer as long as the destination MAC address of the first byte is odd can be spread in the whole MAC level broadcast domain, if it is changed to 192.168.1.255 the amount that can only be in the local 192.168.1.0, packet in the router, however, is only possible through the 224.0.0.1,

CodePudding user response:

refer to the second floor kinkon007 response:

MAC layer as long as the destination MAC address of the first byte is odd can be spread in the whole MAC level broadcast domain, if it is changed to 192.168.1.255 the amount that can only be in the local 192.168.1.0, packet in the router, however, is only possible through the 224.0.0.1

IGMP between the host and the router, isn't it, why I query router sends the query message may also the router ah, have a router between him and the host