> For the complete documentation index, see [llms.txt](https://til.notdu.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://til.notdu.com/back-end/network/the-internet/internet-infrastructure.md).

# Internet Infrastructure

The Internet backbone is made up of many large networks which interconnect with each other. These large networks are known as **Network Service Providers** or **NSP**s. 

Each NSP is required to connect to three **Network Access Points** or **NAP**s

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