A network is defined as two or more computers linked together to share information and hardware. An example of this is two computers sharing a single printer. The computer that has the printer connected to it can share it so the other computer can use it as well. This helps in reducing purchases of redundant computer hardware.
The Internet is defined as a global network of computers and devices. The Internet can be used to gather information, play online games, watch TV or just read email. Setting up a router for your business will allow for your computers to share an Internet connection.