The main difference between an ONT (Optical Network Terminal) and a router is their functionality.
An ONT is a device used in fiber optic networks to convert optical signals into electrical signals. It is installed by the Internet Service Provider (ISP) at the customer's premises and is responsible for receiving and transmitting data over the fiber optic connection. The ONT connects to the ISP's network and acts as the gateway for the internet connection.
On the other hand, a router is a device that connects multiple devices in a local network and allows them to communicate with each other and access the internet. It acts as a bridge between the local network and the ISP's network, managing the flow of data between them. Routers also provide additional features like network security, wireless connectivity, and port forwarding.
In summary, while the ONT is specifically designed for fiber optic connectivity and acts as the gateway for the internet connection, the router manages the local network and provides additional features for connectivity and security.