Notes

A computer network is a telecommunications network that allows
computers to exchange data.
▪ The physical connection between networked computing devices is
established using either cable media or wireless media.
▪ The best-known computer network is the internet
COMPUTER NETWORKS
▪ A collection of computing devices that are connected in various ways
in order to communicate and share resources.
▪ Usually, the connections between computers in a network are made
using physical wires or cables.
▪ However, some connections are wireless, using radio waves or
infrared signals
TYPES OF NETWORK
▪ Based on the size and the coverage area, networks
are categorized into the following types:
▪Personal Area Networks (PANs)
▪ A personal area network (PAN) is a computer network used for communication
among computer and different information technological devices close to one
person.
▪ Is a small network established for communication between different
devices, such as laptops, computers, mobiles, and PDAs.
▪ A pan may include wired and wireless devices.
▪ The reach of a pan typically extends to 10 meters
▪Local Area Networks (LANs)
▪Metropolitan Area Networks (MANs)
▪Wide Area Networks (WANs)