A network is a collection of computers and mobile devices connected together via communications devices and transmission media, often wirelessly allowing computers to share resources.

Communication Device

        -  Hardware component that enables a computer to send and receive data, instructions, and information to and from one or more computers.

Transmission Media

·              -The materials capable of carrying one or more signals

Advantage of Network

Hardware Sharing- Network facilitate the sharing of hardware devices

Data and Information Sharing- enable many people to access and share the same data such as database and group software development

Facilitate Communication- People communicate efficiently and easily via e-mail, IM, VoIP

Disadvantage of Network

Undesirable sharing- Viruses are easily spread over network and the Internet

Security Issues- A computer hacker can get unauthorized access by using different tools