Technical obstacles in deploying new protocols due to limi-tation imposed by IPv4.
IPng (IP next generation) effort was started to solve these issues.
After large amount of dis-cussions, around year 1995, IPv6 (IP version 6) was picked as the final IPng proposal.
preview:
http://www.interpeak.com/files/ipv6intro.pdf
1/15/2004
