properities

Facilitate communications 

Using a network, people can communicate efficiently and easily via email, instant messaging, chat rooms, telephone, video telephone calls, and video conferencing.

Permit sharing of files, data, and other types of information

In a network environment, authorized users may access data and information stored on other computers on the network. The capability of providing access to data and information on shared storage devices is an important feature of many networks.

Share network and computing resources

In a networked environment, each computer on a network may access and use resources provided by devices on the network, such as printing a document on a shared network printer. Distributed computing uses computing resources across a network to accomplish tasks.

May be insecure

A computer network may be used by computer hackers to deploy computer viruses or computer worms on devices connected to the network, or to prevent these devices from normally accessing the network (denial of service).

May interfere with other technologies

Power line communication strongly disturbs certain forms of radio communication, e.g., amateur radio.^[5] It may also interfere with last mile access technologies such as ADSL and VDSL.^[6]

May be difficult to set up

A complex computer network may be difficult to set up. It may also be very costly to set up an effective computer network in a large organization or company.