What's makes such a high-speed network possible? Besides the fiber optic cables that KDDI must install, residential customers will also need Gigabit Ethernet networking in the home to utilize the full potential of the service. Due to Internet traffic and other delays inherent in global networks, customers will rarely see anything close to 1 Gbps in practice. Still, we would all love to have that particular "problem."See also - How Fast Can the Internet Get?