A network is any collection of independent computers that communicate with one another over a shared network medium. A computer network is a collection of two or more connected computers. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams.
When these computers are joined in a network, people can share files and peripherals such as modems, printers, tape backup drives, or CD-ROM drives. When networks at multiple locations are connected using services available from phone companies, people can send e-mail, share links to the global Internet, or conduct video conferences in real time with other remote users.
Every network includes:
✅ At least two computers Server or Client workstation.
✅ Networking Interface Card's (NIC)
✅ A connection medium, usually a wire or cable, although wireless communication between networked computers and peripherals is also possible.
✅ Network Operating system software, such as Microsoft Windows NT or 2000, Novell NetWare, Unix and Linux.
Benefits of Computer Networks
✅ Sharing hardware or software
✅ Centralize administration and support
✅ Increased speed
✅ Reduced cost
✅ Improved security
✅ Centralized software managements
✅ Electronic mail
✅ Flexible access
Disadvantages of Computer Networks
✅ High cost of installation
✅ Requires time for administration
✅ Failure of server & cables