Data Transmission Media | What are the types of Data Transmission ?

What is Data Transmission Media ?

Data transmission media is a medium for transmitting data.  Meaning that data transmission media is a means of transporting the data from the center to the receiver.  

Data transmission media can be transmitted in two ways, which are wired or wireless media.



Types of Data Transmission Media 

In this, there are two types of data transmission media, one wired and the other wireless.

1. Wired Transmission media 

Wired media is also called guided media.  In wired media, the signal is transmitted through a physical medium.  Such as Twisted pair cable, Coaxial cable, Fiber optic cable


Twisted Pair Cable 

It is interconnected, this technology is being used for a long time, Unshielded Twisted Pair (UTP) and Shielded Twisted Pair (STP) are the two main types of twisted pair cable, which we use according to the requirement.

Twisted pair cable is easy to use, as it is easily available in the market, and it is the cheapest cable.  

This wire is used to connect the modem to the telephone line from the computer, this wire is used for telephone, most internal communications, to establish a local network of computers, etc.


Coaxial Cable 

Co-axial cable is made up of center copper conductor(core), this core is covered with second conductor insulation.  

Which is again covered with a plastic cover.  Co-axial cables are classified according to their impedance, coaxial cable is classified as 50 ohms digital transmission and 75 ohms analog transmission, its wire diameter is approximately 0.4 inch to 1 inch, twisted pair.  

It is very secure as compared to cable, they are not easily broken, their speed is faster than twisted pair cable, coaxial cable is used for long-distance.


Fiber Optic Cable 

Fiber optics cable is made of fiber, which conducts light, this wire is made of thousands of fibers of glass, this fiber can be in the form of glass and plastic, in which each glass fiber is as fine as a hair  It happens, the transmission of data in fiber optics cable is very fast.  

This cable is compared to all cables, this cable has the innermost core, optics fiber core, which is made of plastic and glass, in which data is transferred compared to the speed of light, this core, optics buffer  The tube is surrounded by a layer of the protective outer jacket over it.  

This cable is stronger for safety, it is used for both short and long distances.


2. Wireless Transmission Media 

Wireless is also called unguided media.  In wireless media, the signal is not transmitted through any physical medium.  

In this, two devices get together through a wireless signal.  

In this, data is transmitted wirelessly without guiding the data by any cable, due to which it is unguided.


Analog and Digital Data Transmission 

An analog signal is a continuous wave that changes over a period of time.  As we know the signal is used to carry data from one device to another.  

There is no fixed analog signal.  If you understand the analog signal in simple language, then the analog signal is a regular electrical signal that keeps on changing from time to time, this change follows the non-electric signal, sending our voice from one place to another in the conversation on the telephone.  happens through.


Digital signal 

Digital signals are irregular, these signals keep changing in different steps, with different levels or values, they keep pulse or digit.  

The value of each pulse remains constant but changes suddenly from one digit to the next.


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Analog & Digital Data Transmission 

Data Transmission 

A computer network is designed to send information from one point to another. 

This information has to be converted into digital and analog for transmission.  

Data is sent from one point to another via electrical signals, which can be in digital or analog form.


Analog Data Transmission 

In analog signals, the transmitter power varies over a continuous range, for example, the amplitude (V) of sound, light, radio wave analog signals is measured in volts and its frequency (F) in hertz (Hz).  

The higher the frequency of the signal, the greater the number of times it crosses the time axis.  However, a


Digital Data Transmission 

A digital signal is a sequence of voltage pulses in binary form.  Computer-generated data is digital, whereas telephone lines used for data communication in computer networks are usually meant to carry analog signals. 

When digital data is to be sent over an analog facility, the digital signal must be converted into analog form.  

The technique by which a digital signal is converted into its analog form is known as modulation.  

The reverse process, i.e., the conversion of the analog signal into its digital form at the destination device is called demodulation.



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