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). To find the best router for fiber internet, we used our expertise to select items based on key specs, such as speeds, coverage, wireless standards, security, weight, and additional features. I worked with the Cybernews research team to review and compare different routers and give. If you want to purchase it, a gigabit router is the best choice for maximizing the potential of fiber optic Internet. Think of it like putting high-performance tires on a sports car—you need the right equipment to get the most out of the engine. While a standard router works for older cable.