hai all,
i am wating eagerly to get the reply for the query
Can any one give me the basic concept of IGMP protocol ?
if any one is aware of the above feature please do reply?
multicast is a group of message that is used to send the information to a group of hosts which is in a network
to handle such type of messages router uses the protocol named as igmp
in the ip address range we have a range of which is reserved for the useage of handling the multicast group .
class D address is used for this purpose
in the class D address range there are some more addressess which is reserved for the multicast purpose
class D address have the range which starts from
224.0.0.0 - 239.255.255.255
this represents a group of hosts in a network
some addressess are reserved for some purposes
ie
224.0.0.1 - all systems on this subnet
224.0.0.2 - all routers on this subnet
224.0.0.5 - ospf routers
224.0.0.6 - ospf designated routers
224.0.0.12 - DHCP Server/ relay agent
apart from that
globally scoped addressess are
224.0.1.0 - 238.255.255.255
they are used to send multicast data between organisations and across the internet
limited scoped addressess
239.0.0.0 - 239.255.255.255
