For the most part it is. There are multicast flooding optimizations which can be enabled (if the switch supports it) which will constrain IP multicast traffic to only ports which have joined a given multicast group. There are exceptions to what will be constrained by the switch. I do not know if this applies to EIGRP (or any other multicast group using 18.104.22.168/8).
Steven Davidson wrote:
I do not know if this applies to EIGRP (or any other multicast group using 22.214.171.124/8).
AFAIK, CGMP and IGMP snooping does not work for Local Network Control Block 126.96.36.199/24. Frames are flooded to all ports within VLAN as broadcast traffic would do.
Quick search suggests this discussion Regarding IGMP suppression
Wikipedia actually explained it pretty well. To sum it up I would say it is because the least significant bit of the first byte. That is how the switch decided to broadcast both broadcast and multicast traffic. And that is also why you see the addresses starting with 01 the last bit in the first byte will always be a one.