Digital Transmission.  Please respond to the following:

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compare and contrast the data communication technologies of guided media and  unguided media .this should include transmission media ,data link protocols and multiplexing.

            Transmission media

Is a pathway through which individual systems are connected to route data signals in a network.it makes it possible to transmit electronic signals from one computer to another, in a form of binary pulses.Each type of transmission is varies in its charateristics , that makes it suitable for periodic type of service.

Guided transmission

consists of physical connection between source and destination via wire or a cable , these connections are bounded to a channel to follow. the three common types are-

Twisted pair cable

co-axial cable

fiber -optic cable

Unguided  transmission media

In this one no connection between source and destination , instead they use air itself these connections are bounded to a channel to follow .there are two types  .

microwaves

Travels in straight lines therefore narrowly focused concentrating all the energy to the beam.

periodic repeaters are necessary for long distances.

For receiving and receiving the antennas should be aligned accurately

cannot penetrate through buildings

Best example is blue tooth technology 

Satellite:

Uses micro wave radio to prevent  from atmosphere and to act as microwave relay station .

capable of receiving , relaying of voice,data and TV signals 

bad weather can affect the communication 

Data  link control protocols

 Is a group of protocols or rules for transmitting data between network points. Its one of the most used of many protocols .Data link control helps with the flow  and error control of transmission. 

Multiplexing 

It aides in achieving transmission efficiency. its a technique by which  different different analog and digital streams of transmission can be simultaneously processed over a shared link.It divides the high capacity medium into low capacity logical medium which then shared by different streams.

Compare digital transmission to analog transmission to determine the advantages of digital transmission.

Analog transmission is a method of conveying voice ,data , image ,signal  or video information. it uses a continuous signal varying in amplitude , phase  or another property that is in proportion to a specific characteristics of a variable.

Data Transmission also known as digital transmission or digital communication is a literal transfer of data  over a point to point .transmission medium such as copper wires ,optical fibres , wireless communication media , or storage media.digital transmission transfers messages discretely.These message are represented  by a sequence  of pulses via a line code. one advantage of digital transmission is that in case of noise its less likely to be affected because the response is analog in nature another advantage is that digital hardware is flexible in implementation. a good example is a computer or keyboard  in this case data that is transmitted via digital transmission may be digital messages that have origins of the data source.

   Reference

Codesandtutorials.com /networking/basics/transmission-media types .php

Tutorials point .com /data_communication _computer _network /physical layer_multiplexing.htm

Differencebetween.net/technology/difference -between -analog-and-digital-transmission

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