The main functions of computer networks

The main functions of computer networks in business today are to simplify and streamline business processes through the use of data and application sharing. Networks enable end users to share both information and hardware resources. By providing this interconnection between the users and common sets of data, businesses can make more efficient use of their resources. The major resources that are shared in a computer network include the following:
■ Data and applications: When users are connected through a network, they can share files and even software application programs, making data more easily available and promoting more efficient collaboration on work projects.
■ Physical resources: The resources that can be shared include both input devices, such as cameras, and output devices, such as printers.Network storage: Today the network makes storage available to users in several ways.Direct attached storage (DAS) directly connects physical storage to a PC or a shared server. Network attached storage (NAS) makes storage available through a specialnetwork appliance. Finally, storage area networks (SAN) provide a network of storagedevices.

■ Backup devices: A network can also include backup devices, such as tape drives, that provide a central means to save files from multiple computers. Network storage is also used to provide archive capability, business continuance, and disaster recovery.