And wireless connections
Line in and Line out
Line in a type of connector found on audio devices to attach a device, such as a microphone, for recording audio. Line-in can be analog or digital. Digital line-in is also called optical line-in.
Wireless networking - which is often just known as Wi-Fi - is a way of getting broadband internet without wires. Wi-Fi allows you to connect several computers at once, anywhere in the house - or if you have a laptop, to even use your computer in the garden. You don’t need to install extra phone lines or cables. Wi-Fi creates a network in your home or office – a little zone where computers can get broadband internet. It uses radio waves, just like TV or mobile phones. You may sometimes hear this zone referred to as a WLAN (Wireless Local Area Network).