What is a Computer Network

Whether wired or wireless, you are able to share data, such as an your Internet connection, files and even hardware, like your printer. The ability to share resources saves money, effort and even file space when one one copy of a file is needed because it can be stored in a central location on the network. The most basic network may utilize just one networking, or Ethernet, cable. However, more complex networks rely on a connection device like a hub, router or switch and fiber optics to span distances.
Home, School and Work
Wireless networking has become increasingly common as well. For instance, your home network may involve several desktops and laptops, which are all connected via wireless modem and individual adapters. Modern wireless networking also allows you to connect netbooks, computer consoles and even cell phones or MP3 players, too. As a wireless network becomes larger, it requires a repeated to strengthen the signal and carry it over lengths or past obstructions.
If you've ever been to a computer lab or if you work in a cubicle, then you've experienced more complex networks. This is how thirty computers can use one or two printers. These allow you to save data in central locations, rather than just on the hard-drive of your local computer. They often use many more wires and can require a dedicated network administrator to ensure the health and productivity of the network.
However, networks can also connect computers that are not in the same geographic location. Such networks, known as enterprise level networks, are in use by larger companies or organizations, such as the military, that have multiple offices and locations. They may span the country or even the world. These networks don't rely upon Ethernet cables. Rather, they use the protocols like TCP/IP, also known as the Internet Protocol suite, for connection-less networking.