For fiber optic internet speeds of 100 Mbps or higher, a router supporting at least 1 Gbps is required. Look for routers with AX or AC designations (Wi-Fi 5 or 6) that support faster speeds than older N standards (Wi-Fi 4). With 100M optical fiber broadband, can I change the gigabit router to increase the network speed? In fact, when you are using 100M broadband, changing to a gigabit router can not increase the speed of the wired network, but it can increase the speed of the wireless network. This should help you make an informed decision. This guide clarifies the requirements for optimal performance, explaining what your existing router can handle and when an upgrade is essential for unlocking the full potential of your blazing-fast fiber connection. Get ready to understand your network's needs. Your router must have a Gigabit Ethernet WAN port to connect to the ONT. Routers designed for DSL (which uses phone line inputs) or cable (which uses coaxial inputs) won't work. Some fiber internet plans. Instead of using your old router, a high-performance Wi-Fi router designed for fiber optic internet will ensure you seamless streaming, online gaming, and remote work all over your space.