"We can test for IPv4 over IPv6, or IPv6 over IPv4 and all sorts of permutations," Kresse says. "The more interesting thing is all the security devices including intrusion prevention and firewalls. There's a whole set of known vulnerabilities in the IPv4 world that these devices are able to detect. But when we move to the IPv6 world, it is unclear…that those devices will be able to find those same vulnerabilities unless a bunch of thorough testing is done."
Read more about lans and wans in Network World's LANs & WANs section.