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). Many major ISPs, such as Verizon and Xfinity, offer fiber connections directly to your door, known as FttP or Fiber. The best router for fiber internet is one that matches your plan speed, home size, and how you use your connection. The NETGEAR Nighthawk WiFi 7 Router BE9300 Tri-Band blew me away with its blazing speeds up to 9. 3Gbps and coverage of up to 2,500 sq.