What is Network and how many types are there? 2021

What is Network and how many types are there?
What is Network and how many types are there?

Network Guys Do you know what a network is? And how many types are there? So let’s understand this a little bit better. A few decades ago when there was no way to communicate like – connectivity, mobile. So people had to resort to pigeons, primitives to send information from one place to another.

At that time people had to face a lot of difficulties in sharing information. In that era, information sharing was not as easy as it was now. Sometimes information is not available. Now you might be wondering what I mean by information. Information such as messages, videos, audio, photos, documents can be anything. let’s start now. What is a network?

Networking is from ABACUS itself. Then used to send answers from ABACUS. Now the same has happened in ABACUS Computer. Now the same is being used. So now we will give you complete information about what is the Networking. Let’s start.

What is Network?


A network is a group of interconnected computers used to communicate with each other and share information and resources. You can connect both wires or wirelessly. Talking of wire, it can be any of these three cables, Twisted cable, Coaxial cable, and Fiber Optics cable. And if we talk about wireless, radio wave, Bluetooth, satellite, infrared, then any of these four can happen.

A network is a collection of all computers, servers, mainframes, network devices. In which data sharing is common. The Internet is the most excellent example of a network. Where millions of people stay connected and share data. Networking devices such as routers, hubs, switches, modems are all used in one network. Everything I explained above is called a network.

The node is spoken on every computer connected to the network. We can share resources like the internet, printers, file servers along with sharing of data on a general basis. Resource sharing means, when you go to Net Cafe and Cyber Cafe, you must have noticed that many computers are connected to each other.

We can also speak network. But one or two printers live in that cafe. Whenever you print from any computer, the print out of the same printer. So with the help of the pay network here, we are sharing the meaning of a resource to a printer. This is called resource sharing.

The world’s largest network is the Internet, in which we keep sharing something every day. Such as WhatsApp, photos, videos, documents, songs, etc. all this has been possible with the help of one’s network. Likewise, when we use our phones, everyone speaks, not being networkable. This means that we are not connected with other mobiles and towers. This was some information, which is what the network is about. Now we will tell you about the network cage.

Definition of Network

With these few criteria, we can tell whether the network of the network is excellent or not. This is Performance, Reliability, Security. Know in detail about each one.


We can measure performance in very good ways. Among them is Transmit Time and the second is Response Time. At the same time, messages from one device to another are used, which is called the transmit time. The time it takes to respond to a request spoken by request time. Like you did some search in Google and the time it takes to get results is response time.

The performance also depends on some other factors. How many users are there, which is the transmission medium, which is hardware and software? By the way, two network metrics are used to detect performance throughput and delay. We want more throughput and less delay on demand. The two are the same.


It means being brave. Unless a network is reliable, it can never be a good network. Reliability means the accuracy of delivery. As long as the data is sent to the device to which it is sending, without link failure, then it is reliable. After link failure, the time it takes to recover from the return is again the same reliability.


The only way we can protect data is by having unauthorized Access. Avoiding loss of data. It is the job of SECURITY to implement policies to prevent data loss. If it is stolen from the DATA network then it is not our data that is Secure. It is very important to have network security

History of Network

The network we are talking about now began several years ago between 1960 and 1970. The name of the network is ARPANET which we call the Advanced Research Projects Agency Network. In Suruwat, the network was intended to connect terminals and remote job entry stations to mainframes. But at that time ARPANET had a basic concept of resource sharing concept.

The ARPANET was quite reliable in that door as it used packet switching technology instead of circuit switching. The ARPANET was also used in the US Department of Defense to send Guinea into danger. Connecting it to various universities in America. Industrialists also started using it. Gradually, he continued to develop more. Today it has become the largest network in the world, which we call the internet.

Network devices (devices used in the network)

If there is a network, all the devices in it are connected, the data is known, the data passes through different computers. Two networks to connect to a LAN and to a computer. For all this, we need some network devices like HUB, repeater, switch, router, modem, bridge. Know about them from bed.


What is a hub?

It is a basic networking device. This device works in the physical layer. Because of this it physically connects networking devices. In networks in which cable is used, it goes. Without any changes, it works to forward a packet to other devices. Whether or not there is a “data packet” for the device, it broadcasts to all these devices without doing it. There are two types of hubs: Active HUB or Passive HUB.


What is the switch?

The device also works on a physical layer like HUB. This DEUBICE is more intelligent than HUB. The hub simply forwards the packet but also filters with switch forwarding. Therefore, it is called intelligence.

When the switch receives the received data packet. He then filters the address of the address and finds out. And the packet forwards that device. Therefore, the switch maintains the CAM (Content Addressable Memory) table. In which the devices are detected. The forwarding table is also spoken to the CAM



What is a modem?

In today’s Internet world everyone uses it. Whenever you use the Internet at home, only then data from outside the world reach our computer. But our computer interprets digital data only as binary 0 and 1. and the data in cables go as an analog signal.

The modem only, built from modulator and demodulator. Let me explain with an example, the data in your computer is in digital form. We need to send this DATA via cable to another computer. For this, we have to convert digital data to analog. This modulator does the same thing. When it goes from analog DATA cable to computer then this analog DATA has to be converted to digital. The demodulator does this. It is used in telephone lines.


What is a router?

By its name, you would have come to know that it is relevant to the route. The device’s job is to control the route and traffic between two networks. It connects the two networks via wired and wireless. This device operates in the network layer of the OSI model. Wireless routers are more commonly used nowadays. It sets the direction of DATA in the same way that traffic police work.


What is a bridge?

The bridge connects two sub-networks in the same way that a router connects two different networks. Which belong to the same network. Let us take an example. You can only connect two computer labs and two floors through the bridge.

What is a repeater?

It is an electronic device. Which helps in increasing the strength of the signal. It can also be called, it is an electronic device that receives the signal and transmits it again. Repeater signal is protection from lost signals. Because of this, the data reaches far and wide without being lost.

If the hostel in a college is far enough away from the college. College people want to provide cable and internet connection to hostels and colleges. Due to too much distance, the DATA is unable to reach the receiver properly and the DATA is lost. The cable between this college hostel and the college will be repeated in the middle of it. The data transmission distance limit of each cable remains. By now you only know that and about networked devices. Now you will know the types of network

Types of network

By the way, there are many types of computer networks. Their size, geographical area, and how computers can persist in a network. Starting with a small networked network, they can connect computers from all over the world.

There are 3 types of networks LAN, MAN, and WAN. After leaving them, there are other things too, such as PAN, or HAN.

What is Personal Area Network (PAN)

This network is also called PAN. It is a small network that has its limits inside a house. For example, in a building, the PAN consists of one or more computers. In addition, telephones, video games, and some other devices are connected.

Technology| Definition, Importance, Types, Examples 2021

Home Area Network (What is HAN)

If some people in the same residence are using the same network, we can call it home area network. It is also called HAN. It is an internet connection with wire on demand. Which is connected with a modem. It provides both modem connections and wired and wireless means. You can do all this work in this network. There is also a WIFI home area network.

You can take a printout of the document sitting in any corner of the house.
You can also upload and download photos
Along with online video sharing, you can also do video streaming.
There is no significant difference between PAN and HAN.

Local Area Network (What is LAN)

Local area network means LAN. You will find this network everywhere such as office, college, school, business organization. This network is used for resource sharing, data storage, and document printing. Some hardware is not required to build it, requiring bus hubs, switches, network adapters, routers, and Ethernet cables.

The smallest LAN can be made up of only two computers. We can connect 1000 computers to a LAN. Most LANs are used in wire connections. But nowadays it is also being used in wireless. The specialty of this network is its speed, low cost, and security. Ethernet cable is used in this.

This network is the same network for document sharing and printing in an office. A central server resides where all files are kept. Any employee can access the file without going there. If someone has to print as well, he can print using the central printer. This is the advantage of LAN. This is called resource sharing.

If a local area network is wireless, it is called a wireless LAN.


  • It is limited in the small geographical area. A home is used in Office and college.
  • It has its own private
  • This network can be easily created
  • The data transmission speed of this network is high

What is Metropolitan Area Network (MAN)

You can also speak Metropolitan Area Network or MAN. It is a network connecting all cities. This network connects all the major colleges, schools, government office networks in a city. MAN is a larger network than LAN. MAN covers from 10KM to 100KM. It is used to create a large network by connecting all the LANs together.

If such a network starts being used on college campuses, they call it a campus area network. The best example of this is the cable TV network. MAN is used to connect LAN to LAN. A large business organization becomes its own MAN. Through which he can connect his various branches.

  • It is confined in large geographical areas such as a town, city
  • It is owned by public and private
  • It costs more to install this network than LAN.
  • The data transmission speed is moderate.

Wide Area Network ( WAN)

The network that follows the LAN and MAN is the wide-area network. By the way, it is the largest network that connects computers worldwide. It is also called WAN. Wide area networks are called LANs of LANs. The specialty of this network is that it has a low data rate, but covers a greater distance. The Internet is the best example of a wide area network.

Vans are of two types

1. Enterprise van

2. Global van

Computers connected to wide area networks mostly use public networks such as telephone lines, leased lines, and satellites. The largest WAN is the Internet.

By the way, there are a lot of wide-area networks. Such as public packet networks, large corporate networks, military networks, banking networks, railway reservation networks, and finally airline reservation networks.

The network service provider is talked to the company providing the network through the WAN. They are said to be the origin of the Internet. The most expensive network is called a WAN. Because some type of technology is used in it. Such as SONET, frame relay, and ATM.


  • Large geographical areas such as two countries in Ups can connect to this network
  • Its ownership is public and private
  • Installing and maintaining this network is difficult.
  • data transmission speed is slow

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