Both. - The font needs to download - The font might not download at all Browsers support these wonderful two defaults called `sans-serif` and `serif`

Both. - The font needs to download - The font might not download at all Browsers support these wonderful two defaults called `sans-serif` and `serif` that will use a default, system-installed, user-controllable font that doesn't need to be downloaded and will be guaranteed to work for any user! { font-family: sans-serif; serif; }