What is computer network and types?
My dear students and friends, in today's article, we will know What is computer network and types?, why it is used and what are the networking devices used in it. So let's know -
In ancient times, pigeons and other animals or birds were used to transmit information that is message from one person to another. After some time letters or messages started being sent by the postman in the post office. In this, people used to take many days to send information from one place to another, people also had a lot of trouble in it, such as it took more time, exhaustion in traveling far and wide, sometimes the information could not be reached. But as time passed, the way of sending information or messages kept on developing as technology progressed.
What is computer network and types?
But in today's modern era, different types of devices equipped with latest technology are available to send information, data or message from one place to another. For example - mobile, computer etc.
So let's know what is a computer network?
Computer Network:-
Connecting a computer system and other equipment together is called a 'network'. In this way, the exchange of information between two or more computers connected together is called 'Networking'. Therefore
"When two or more computers are connected or interconnected by some medium such as a wire or wireless in such a way that they can exchange data or information among themselves, then we call it computer network."
You can also call computer network as data or information network. Various types of components and devices are needed to create or create a computer network such as -
1.Computer
2.Cable
3.Router
4.Network
5.Switch
There are mainly three types of wires used in computer networks-
1. Fiber optic cable
2.Coaxial cable
3. Twisted pair cable .
Types of Computer Network or networking technologies:-
There are mainly four types of computer networks -
1.Local Area Network (LAN)
2.Wireless Local Area Network (WLAN)
3.Metropolitan Area Network (MAN)
4.Wide Area Network (WAN)
5. Personal Area Network (PAN)
6. Virtual Private Network(VPN)
1.Local Area Network (LAN):-
A local area network is a network that is used for a small area. Most of it is used in a building like office, college, school etc. By connecting computers among themselves through any medium (router, server, hub or wire), any type of data, information or information is exchanged among themselves is shared or shared.
LANs can be both small or large, ranging from a home network with one user to an enterprise network with thousands of users and devices in an office, college, school. It is a very cheap, very high speed and widely used network in a limited range. Its range can be only from 50 to 100 meters.
2.Wireless Local Area Network (WLAN):-
A wireless local area network is a local area network that is used to connect within a certain distance. Since computers in LAN network are connected to each other through some wire whereas in WLAN network computers are connected to each other without any wire such as internet (broadband), wifi, radio frequency or bluetooth. Data, information, files or information are exchanged.
The speed of transferring data or information in this network is very high. Its speed is high. The range of the network is between 10 meters to 100 meters.
In this, the speed of data or message transfer is slightly higher than that of LAN. It costs a lot to install it. Its range capacity can be from 10 KM to 100 KM.
The best example of this, which you use 4G or 3G or 5G network in mobile, they all come under the sub-wide area network. Big computer engineers are needed for its maintenance and a lot of money is needed to install it.
5. PAN (Personal Area Network)
This is the smallest and most basic network that you’ll find. It’s meant to cover a very small area (typically a single room or building). A PAN is most commonly used for one individual and to connect just a handful of devices such as a computer, smart phone, and printer. Probably the most well-known PAN technology is Bluetooth connection. So, next time you connect your phone to your car to play music, you can thank your Personal Area Network!
6. VPN (Virtual Private Network)
VPN stands for "Virtual Private Network" and describes the opportunity to establish a protected network connection when using public networks. VPNs encrypt your internet traffic and disguise your online identity. This makes it more difficult for third parties to track your activities online and steal data. The encryption takes place in real time.
A VPN hides your IP address by letting the network redirect it through a specially configured remote server run by a VPN host. This means that if you surf online with a VPN, the VPN server becomes the source of your data. This means your Internet Service Provider (ISP) and other third parties cannot see which websites you visit or what data you send and receive online. A VPN works like a filter that turns all your data into "gibberish". Even if someone were to get their hands on your data.
What is ADSL (Asymmetric Digital Subscriber Line)?
7. ASDL(Asymmetric digital subscriber Line)-
ADSL (Asymmetric digital subscriber line) is a method to send data over copper wires, while it might be part of a WAN or LAN it is not a term that defines a network but rather how a network is connected other. In other words ADSL (Asymmetric Digital Subscriber Line) is a technology that facilitates fast data transmission at a high bandwidth on existing copper wire telephone lines to homes and businesses. Unlike regular dial-up copper telephone line service, ADSL provides continuously available, always-on broadband connections.
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