HI THERE,


ipv4 is intrnet protocol version 4
the one which supports *2 bit addressing.
ipv6 is internet protocol version 6
its a futuristic protocol and supports *28 bit addressing.ipv6 is already implemented in linux 6 and above.

for more on ipv4 and ipv6 pls go to
www.rfc-editor.org and read
rfc 7** and rfc *88*
also visit www.6bone.net