The WAN port on a router is the port that connects your local network to the outside internet. In most home, office, and business networks, the WAN port connects to an ISP modem, fiber ONT, upstream gateway, or internet handoff device. It is the “internet-facing” port of the. The SFP+ port is a high-speed optical-to-optical signal conversion port, mainly used for 10G Ethernet and Fiber Channel network applications. It offers several advantages, including hot-swappability, support for multiple transmission media and protocols, as well as flexibility and scalability. When equipped with one or multiple SFP ports, the networking device can use different SFP modules. A little form-factor pluggable (SFP) port is actually a small, hot-swappable network interface module in networking hardware that connects a communication device's motherboard, such as a router, to a network cable. Consider it as being the connection between your wire outdoors and also the brains. Most routers come with 4 LAN ports and only 1 WAN port. Do I need an ONT between fiber and WAN port router? If your fiber Internet connection is using GPON technology (as opposed to "plain old" fiber Ethernet), then yes, you need an ONT (aka ONU) as it's the device which actually understands how to connect to a GPON network. (GPON is a passive/broadcast.
