Defenition

A computer network is a set of computers sharing resources located on or provided by network nodes. 

Computer Network Devices

The most common types of network devices include hubs, switches, routers, bridges, gateways, modems, repeaters, and access points.

Computer network media

Network media refers to the communication channels used to interconnect nodes on a computer network.

Computer network topology

A network topology is the physical and logical arrangement of nodes and connections in a network.

Network Transmission Media

Transmission media is a communication channel that transmits information from the source/transmitter to the receiver. It is a physical path for data transfer through electromagnetic signals.

What is a wifi?

Wi-Fi is a wireless technology used to connect computers, tablets, smartphones and other devices to the internet. Wi-Fi is the radio signal sent from a wireless router to a nearby device, which translates the signal into data you can see and use.

 Ethernet

Ethernet is a way of connecting computers and other network devices in a physical space. This is often referred to as a local area network or LAN. 

Internet Host

An Internet host can be a machine or an application connected to the Internet that has an Internet Protocol address (IP address).

Network type/categories

LAN: LAN is a collection of devices connected together in one physical location, such as a building, office, or home.

WAN: A wide area network (WAN) is a computer network that covers a large area, for example a computer network between regions, cities or even countries.
MAN: a computer network that connects computers within a metrpolotan area like a large city.
PAN: a computer network for interconnecting electronic devices within an individual person's workspace.