Question: what is the difference between ipv4 and ipv6 and why is ipv6 necessary?
Answer: The 128-bits in the IPv6 address are eight 16-bit hexadecimal blocks separated by colons. ... IPv6 uses an integrated address space for multicast, at FF00::/8. IPv4 uses “broadcast” addresses that forced each device to stop and look at packets. IPv6 uses multicast groups.