Yes, you can often use your existing router with fiber optic internet, but there are crucial considerations. Understanding compatibility, potential limitations, and when an upgrade is necessary will ensure you get the most out of your high-speed connection. In this detailed guide, we'll explore the role of routers in internet speed, how they can influence your overall experience, what specifications to look for, and practical tips to optimize your network performance. DUAL-BAND WIFI 6 ROUTER: Wi-Fi 6 (802. Basics Google Fiber internet comes to your home through light over fiber optic cables (this differentiates fiber internet from your typical DSL or cable internet); Google Fiber Webpass customers get. FTTP connects homes and offices directly to fibre optic cables which, using light pulses as signals, can carry data very quickly.