The primary distinction between the internet and a network is that a network is made up of closely linked computers that can be used as personal computers to share data with one another. The internet, on the other hand, is a technology that connects these small and large networks to form a massive network. The network may be extended up to a country, whereas the internet may connect countries, continents, and even the entire world.
Reference: https://www.guru99.com/difference-between-network-and-internet.html#:~:text=Network%20is%20defined%20as%20a,are%20spread%20across%20the%20globe.