What connects directly to the internet source and is usually set up by the service provider?

The device that connects directly to the internet source and is typically set up by the service provider is a modem. A modem acts as a bridge between the internet service provided by your ISP (Internet Service Provider) and your local network. It takes the data coming from the provider via telephone lines, cable, or fiber and converts it into a format that can be understood by your home or office network.

The modem establishes and maintains a connection to the internet, allowing devices on the network to send and receive data. It's an essential component for internet connectivity, serving as the gateway for all incoming and outgoing internet traffic to and from your location.

While other devices like routers, switches, and access points are also crucial for networking, they serve different purposes. A router routes traffic within a local network and can connect multiple devices to the internet, while a switch connects devices within the same network to allow them to communicate. An access point extends a wireless network, enabling devices to connect without cables. However, none of these devices connect directly to the internet source in the same manner that a modem does.