LAN, also known as Local Area Network, is very important for those who have at least two computers at home. It can be used for various purposes. It will be very useful if you want to send data from one computer to another, or if you want to play a computer game with a member of your family. Of course, it can also be used for many other useful things. I think that LAN is very important to various companies and businesses. LAN is also very useful in offices and school labs where people should share information with each other. The good thing about LAN is that you do not need any Internet connection to have your computers exchanging information with each other. I know that most of us have Internet at home anyway, but LAN can also be used in environments where for some reason there is no Internet access. One of the biggest advantages of LAN is that it is a secure network. That is why it is an excellent choice for businesses that send important data, and would not want anything to leak on the Internet. Local networks have also the capability to have very fast file transfers, which allows to share very large files with other users on the network.