What is Network ?
A computer network is a digital telecommunications network which allows nodes to share resources. A network is a collection of computers,servers,network devices,peripheral or other devices connected to each other for shareing the data.
What is Networking ?
Computer networking is the subject which explains, How computer connect with each other for sharing resources and information & what technology and devices they use for the connectivity ?
What is Inter-Networking ?
When two or more networks or subnets connected to each other for communication between hosts on different types of network that informs internetworking.
Why we use Computer Network?
- Share data & Resources.
- Reducing the required number of devices.
- Platform to communicate with other users in network.
- Multiple user's work on a single project.
- Store data in a centralized location.
- Security policy.
- Track and monitor the use of resources.
- Financial Services.
- Online education
The main purpose of computer networking is the sharing:-
@ Data Sharing
Networking allows us to share data between connected devices. Let’s take a simple example. Suppose there are two computers which exchange data on regular basis. Without networking, the following steps are required to exchange data between them.
In sender PC, write data in an external device (such as CD, DVD and USB). Move that external device to the receiver PC
In receiver PC, read or copy the data from that external device. If the data is exchanged 100 times a day, we have to follow these steps 100 times a day. In such a situation, where the data is often exchanged, this method is neither convenient nor appropriate.
In this case, networking is a better solution. Once networking is done, we can exchange any amount of data between connected devices at any time without using any external device.
Networking allows us to share devices among the computers. By sharing the devices, we can reduce the number of required components in the network. Let's understand this with a simple example.
Four computers are used in a small office. Computers are not connected with others. Each computer generates some print jobs daily. To fulfil the print requirement of each computer, without networking, we have to buy the four printers; one for each.
By connecting these computers through networking, we can reduce the required number of printers up to one. Once networking is done, only one printer will be sufficient to meet the print requirement of all computers.
There are two types of device:-
1) Shareable: - Devices which can be shared in the network such as hard disk, printer, modem, scanner, CD, DVD, USB etc.
2) Non-Shareable: - Devices which cannot be shared in the network such as CPU, RAM, Motherboard, Monitor, etc.
NOTES~ Although advance networking techniques, such as cloud computing, allow the sharing of any resource including the CPU and the RAM, but for the initial level, you should stick with the traditional types listed above; shareable and non-shareable. This will help in understanding the complex networking concepts in a simple way.
Just like data and resource, through the networking we can also share an application. In Application sharing, an application is installed in two parts; server application and client application. Both parts are used to provide and request service or data respectively.
Let's take a simple example.
A user connects his system to the Internet and watches a video on YouTube. YouTube, which provides the requested video, is the example of a server application. And the browser or app, that the user uses to watch the video, is the example of a client application.
Application sharing is mostly used in company environment. In companies, usually a project is assigned to several users or a team which have several members. Networking allows concerned users or members to work on assigned project simultaneously. Besides this, it is also used for the troubleshooting and accessing a networking device or a computer remotely.
Difference Between LAN,MAN & WAN:-
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Thanks & Regards
Abhishek Pathak
+91-9621134014
abhishek9621134014@outlook.com
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