There are various adapters that you can use to connect network plugs, HDMI and USB devices to your MacBook Air. Here are some options:

- USB-C to USB adapter: This allows you to connect conventional USB devices.
- USB-C to HDMI adapter: This allows you to connect to HDMI-capable displays.
- USB-C to Ethernet adapter: This allows you to connect your MacBook Air to the internet via a network cable.

These adapters are available from Apple or other suppliers. Make sure you choose the right adapter for your specific connection requirements.