Explanation:

- Option 1: Hub

- A hub connects multiple devices in a network, particularly in LANs, allowing them to communicate. It’s not a web server.

- Option 2: Host

- A host is a computer or server that hosts websites and makes resources available to other computers on a network. Web servers are commonly referred to as hosts.

- Option 3: Gateway

- A gateway acts as a bridge between two networks, facilitating communication and data transfer.

- Option 4: Repeater

- A repeater extends the signal range in a network by amplifying it. It’s not related to hosting web services.