Modulation is a signal which gives the addition of information to an electronic signal carrier. The same as morse code which are invented for telegraphy and still used in radios .
-Demodulation
Demodulation is a electronics process by an output wave/signal is obtained having the aspect of the orginal modulating wave/signal. Demodulation process is basically the reverse process of modulation.
-Bandwidth
Bandwidth is a signal process which is passed through frequency or radio bandwidth by the range of frequencies . Bandwidths are normally counted by hertz . Bandwidth could also be the rate of data transfer . These bandwidths are counted by bit rate .
-TCP/IP
Transmission Control Protocol/Internet Protocol(TCP/IP) is the language or protocol of the internet. The IP is the basic communications to private or public network . You may be able to send the file to another computer which has IP address through the internet.
-Node
Node is a connection point either a redistribution point or communication end point . The definition of node is not fix and it depends on the network and protocol layer. Its probably an active electronic device that is fixed to a network and have to ability to send , receive or forwarding informations through a communication channel.
-Client
Client is an application that is able to access a remote service on another computer system , which is also known as server . Clients that connect to the web server and also get web pages are known as Web browsers.
-Server
Server is a computer program which runs to serve the needs of other programs, also known as clients. Its a software/hardware system which is running on a dedicated computer such as a database server, file server, etc etc
-Network Operating Systems
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