Security hacker computers and computer networks, and that cracker is the more appropriate term for those who break into computers, whether computer criminal (black hats) or computer security expert (white hats). A 2014 article concluded that "... the black-hat meaning still prevails among the general public". In computer security, a hacker is someone who focuses on security mechanisms of computer and network systems. While including those who endeavor to strengthen such mechanisms, it is more often used by the mass media and popular culture to refer to those who seek access despite these security measures. That is, the media portrays the 'hacker'
IPv6-to-IPv6 Network Prefix Translation IPv6-to-IPv6 Network Prefix Translation IPv6-to-IPv6 Network Prefix Translation (NPTv6) is an experimental specification for IPv6 to achieve the address-independence at the network edge, given by network address translation (NAT) in Internet Protocol version 4. It has fewer architectural problems than traditional IPv4 NAT; it is for example stateless and preserves the reachability attributed to the end-to-end principle. However, the method still lacks solutions to translate embedding IPv6 addresses, for example in IPsec, and requires a more complex DNS setup (split-horizon DNS). One use case for IPv6-IPv6 Network Prefix Translation is multihoming for small networks; this may also be implemented with