INTRO TO IT: Communication and Network

Twisted pair :
A cable composed of two small insulated conductors twisted together without a common covering.

Coaxial cable :
Consists of an outer conductor and an inner conductor separated by an insulating plastic filler. Usually,these two conductors usually carry equal currents in opposite directions,some of the examples are cable TV hookups and also certain types of computer networks.

Fiber-optic cable :

A technology that uses glass or plastic, threads (fibers) to transmit the data.A fiber optic cable consists of a bundle of glass threads, each of which is capable of transmitting messages to modulate onto light waves.

Node :
In a communications system, a node is a network junction or connection point. Every terminal, computer, hub and switch is a node.But,in database management, a node is an item of data that can be accessed by two or more routes.

Client :

The customer of a vendor or consultant. The client of an IT department is the end user.At the same time,it also refer like a user's computer, which is generally a Windows, Mac or Linux desktop or laptop. The term implies that the client machine is connected to a network

Server :

A server is an application running on a computer that delivers a service and the way a server and a client dialogs is called a protocol

Hub :
It is important place because its facilitating movement or transportation whilst supporting a load, or performing labor in machines

Network Interface Card (NIC) :

In computer networking, it provides the hardware interface between a computer and a network.

Network Operating System (NOS) :

An operating system that contains components and programs that allow a computer on a network to serve requests from other computer for data and provide access to other resources such as printer and file systems