A unique string of numbers that identifies each device on a network. Like a virtual return address.

A permanent ID number assigned to a device’s network card when it’s manufactured.

A Local Area Network. A small network confined to one area, like your home or office.

Receiving data from a remote system. Contrast with uploading data to a remote system.

Watching a video or listening to audio in “real-time”, as it’s sent to you, rather than downloading first.

A marketing buzzword for services provided over the internet, rather than locally on your device.

Paying a company to store your website’s files and data on a server so it’s accessible 24/7.

How much data you can send over a connection in a given time. ISPs state speeds in Mbps.

The part of a URL that identifies a website, like google.com or en.wikipedia.org.

The most essential internet communication tool. You’ll need an email address for most online services.