Question: what is the difference between ipv4 and ipv6 header?
Answer: Following are the main differences and comparison between IPv4 header and IPv6 header. IPv6 header is much simpler than IPv4 header. The size of IPv6 header is much bigger than that of IPv4 header, because of IPv6 address size. IPv4 addresses are 32bit binary numbers and IPv6 addresses are 128 bit binary numbers.