The basic IPv4 header has a fixed size of 20 octets; the variable-length options field increases the size of the total IP header. IPv6 contains fields similar to 7 of the 12 IPv4 basic header ...

With IPv6, the Payload Length only counts the size of the data carried in the IP packet; the size of the IPv6 header (40 bytes) isn't included. Ethernet can carry packets up to 1500 bytes long.

IPv6 includes autoconfigured address and special support for mobile (not always wireless) users. A new mobile feature called chained headers might allow the faster forwarding of IPv6 packets through ...

The IPv6 header is always 40 bytes and can be followed by any number of extension headers and then the data. This approach is more flexible but harder to process since the number and size of ...