IPv6英语演讲PPT:Nowadays,withthedevelopmentoftheInternet,therehasbeenmoreandmorepeoplewhoareabletoaccesstheInternet.Butmeanwhile,italsoposesabigthreatandwehavetofacetherealitythatIPv4addressspaceareexhausted.AlthoughNAT(Networkaddresstranslation)andprivateaddresscanalleviatetheshortageo