In a Nutshell: Think of `外网` as the vast, public ocean of information that is the internet you use to access Google, YouTube, and international news. It's the “outside” network. This term is almost always used in contrast to its opposite, `内网 (nèiwǎng)`, the “inside net,” which is a private network for a specific company, school, or organization. So, if you're at work in China, the `内网` is for company files, while the `外网` is for everything else.