Compare the differences between IPv4 and IPv6 header formats. Discover the changes and explain why these changes were made. In the IPv4 header, there is a protocol id field. What is the functionality...

Compare the differences between IPv4 and IPv6 header formats. Discover the changes and explain why these changes were made.

In the IPv4 header, there is a protocol id field. What is the functionality of this field? Is there a corresponding field in the IPv6 header?