This paper evaluates effect of the overheads caused by 6to4 tunneling on QoE for Web services by experiment. The authors consider Web usability as QoE and treat three actual Web services which support both of the IPv4 Internet and the IPv6 Internet. The results show that the effect of QoS degradation caused by 6to4 on Web usability depends on the Web service. According to Web service, QoE degradation caused by 6to4 does not always occur.
