What Is Network communication Media?
The Path through which data is transmitted from one place to another is called network communication media.
There different types of communications media.
1. Guided Media
In guided media, communication devices are directly connected with each other using some physical media like wires. It is also called bounded media.
Examples
- Twisted Pair
- Coaxial Cable
- Fiber Optic
2. Unguided Media
In unguided media, communication devices communicate with each other through air or space using broadcast radio signals, microwave signals and infrared signals. Unbounded media is used where it is impossible to install cables. Data can be transferred all over the world using this media. It is also called unbounded media.
Examples
- Microwave
- Communication Satellite
- Mobile Communication
Types of guided media.
Different guided media are as follows:
1. Twisted Pair
Twisted pair is the most commonly used physical transmission medium. It is used in local area network (LAN) to connect computers and other devices.
Twisted pair consists of a pair of copper wires. The pair of wires is covered by a plastic insulation and it is twisted together. Twisting of wires protects them from interference by external electromagnetic waves.
Characteristics of Twisted Pair
Different characteristics of twisted pair are as follows@
- It is an inexpensive transmission medium.
- it is easy to install.
- It can transfer data to short distance.
2. Coaxial Cable
Coaxial cable consists of copper wire covered by an insulating materiel. The insulated copper wire is covered by copper mesh. The mesh protects the data signals from interference by external electromagnetic waves. Coaxial cables are used by the able TV network and telephone companies.
Characteristics of Coaxial Cable
Different characteristics of coaxial cable are as follows:
- It is more expensive transmission medium than twisted pair.
- It provides higher data transfer rate than twisted pair cable.
- It can be installed very easily.
3. Fiber Optic
A fiber optic cable transmits data as pluses of light through tiny tubes of glass. a Typical fiber optic consists of very narrow strand of glass called core. The strands are thin like human hair. The core is the center of the fiber where light travels. There is a concentric layer of glass around the core called Cladding. It reflects the light back into the core. The cladding has a protective coating of plastic called jacket.
An important characteristic of fiber optic is refraction. Refraction is the characteristics of a material to either pass or reflect light. Most telephone companies, ISPs and cable TV operators are using fiber optic in their networks.
Advantages of Fiber Optic
- Fiber optic networks work at a very high speed.
- The information carrying capacity of fiber optic is very high.
- Fiber optic is lighter and smaller in size.
- It is more secure and reliable form of data transmission.
- It is not affected by electromagnetic waves.
Disadvantages of Fiber Optic
- It is difficult to install.
- It is expensive.
What Is Unguided Media?
Different unguided media used in communication are as follows:
- Microwave
- Communication Satellite
- Mobile Communication
1. Microwave
Microwaves are radio waves that are used to provide high speed transmission. Both voice and data can be transmitted through microwave. Data is transmitted through the air from one microwave station to other similar to radio signals.
Microwave uses line-of-sight transmission. It means that the signals travel in straight path and cannot bend. Microwave stations or antennas are usually installed on high towers or buildings. Microwave stations are placed within 20 to 30 miles to each other. Each station receives signal from previous station and transfer to next station . In this way, data transferred from one place to another. There should be no buildings or mountains between microwave stations.
2. Communication Satellite
Communication Satellites are used in wireless communication over large distances.
This communication uses the satellite and earth-based stations. The satellites are placed around the globe about 22,300 miles above the earth. A satellite receive microwave signals from earth-based station. It amplifies the signals and retransmits them back to different earth-based station. The transmission from earth station to satellite is called uplink. The transmission from satellite to earth station is called downlink.
An important advantage of satellite is that a large volume of data can be communicated at once. The disadvantage is that bad weather can severely affect the quality of satellite transmission.
3. Mobile Communication
Mobile communication is radio-based network. It transmits data to and from mobile computer. It is widely used all over the world.
Conclusion:
I hope you understand network communication media very well. To Sum up now-a-days the most communication media are using is unguided media it is better than guided media but guided media has it own value some time we need to use the guided media.
Take Care; ALLAH HAFIZ
FAQs about network communication media:
What is uplink?
The transmission from earth station to satellite is called uplink.
What is downlink?
The transmission from satellite to earth station is called downlink.
What is Cladding?
The core is the center of the fiber where light travels. There is a concentric layer of glass around the core called Cladding.
What is Core?
A typical fiber optic consists of very narrow strand of glass called core.
What are the Examples of unguided media?
- Microwave
- Communication Satellite
- Mobile Communication
What are the Advantages of fiber optic?
- Fiber optic networks work at a very high speed.
- The information carrying capacity of fiber optic is very high.
- Fiber optic is lighter and smaller in size.
- It is more secure and reliable form of data transmission.
- It is not affected by electromagnetic waves.
What are the examples of guided media?
- Twisted Pair
- Coaxial Cable
- Fiber Optic
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