MODULATION
Is the process of varying one or more properties of high-frequency periodic waveform which is called the carrier signal. It enables the carrier signal to transport the information in the modulation signals to some destination.

DEMODULATION
Is the act of extracting the original information-- bearing signal from a modulated carrier wave
It is also easily attenuated and does not travel well through a machine structure.

BANDWIDTH
Or digital bandwidth a rate of data transfer, bit rate or throughput, measured in bits per second (BPS) or it can also mean
the amount of data that can be carried from one point to another in a given time ( USUALLY A SECOND) this kind of bandwidth is usually expressed in bits ( of data) per second (BPS)

TCP/IP (TRANSMISSION CONTROL PROTOCOL / INTERNET PROTOCOL
Is the communication protocol for the internet.TCP/IP defines the role computers must follow to communicate with each other over the internet
basically it is the communication language or protocol of the internet.


NODE
It is a connection point either a redistribution point or a communication endpoint. node definition also depends on the network and protocol layer referred to it can either be an active electronic device that is attached to a network and is capable of sending, receiving or forwarding information over a communication channel and it can be passive distribution point such as distribution frame or patch panel.


CLIENT
Is a n application or system that accesses a remote service on another computer system, known as a server by way of a network.


SERVER
Is a program that operates as a socket listener. The term server is also often generalized to describe a host that is deployed to execute one or more of such programs.


NETWORK OPERATING SYSTEM
It is referred to as the dialogues that runs on a server and enables the server to manage data, users, security, groups, application and other networking functions. It is also designed to allow shared file and printer access among multiple computers in a network


NETWORK ADMINISTRATOR
Is a person responsible for the maintenance of a computer hardware and software that comprises a computer network. This includes deploying configuring, maintaining and monitoring active network equipment. A network administrator may also design and deploy networks.