Why we need computer networks?
AFile sharing: Networking of computers helps the network users to share data files.
BHardware sharing: Users can share devices such as printers, scanners, servers etc. Without computer networks, device sharing is not possible.
CApplication sharing: Applications can be shared over the network, and this allows to implement client / server applications.
DRemote Data Backup: It's crucial to back up your computer data regularly. A network makes it easier to back up data on a remote backup media.