How Computer Network Works?
Computer network is the group of the computer systems that are connected to each other remotely. That computer system includes many other devices over the internet such as printer, router, hub, gateway… All the systems in the computer networks are linked together to share hardware as well as software resources. If someone asks, what is the computer network, it is sufficient. But How Computer Network Works, is really interesting.
If you want to know how does computer network work. It is simple as any non-technical guy understand it, and also it is too complex as any technical expert understand it. So if I am considering you new to the computer network, I would say, it is too easy to know How Computer Network Works.
Understanding How Computer Network Works begins here…
Consider Home drainage system, all the pipes and plumbing you find in your home. It is same as cable wires you find in the computer network. Drainage system uses pipes to make the water flow and computer network uses the cable to transfer your data from source system to destination system.
The drainage system in our society is interconnection among multiple home drainage system, we call it as LAN (Local Area Network) in computer networking. There is the complete drainage system in our city, likewise there is WAN (Wide Are Network) through which all systems are interconnected over the internet.
It is really so simple, isn’t it?
Let’s put some head on it, little bit deeper…
Consider you are sending the parcel to your friend who is situated in another country land. You can choose any courier service like Bluedart, Fedex… Bluedart verifies the parcel, weight it, pack it and then apply the appropriate sticker. This sticker describes everything about the parcel. Bluedart then ships and delivers it to other station.
The parcel your are sending to your friend is same as data packet over the network. It goes through all the phases before it delivers to the destination. Every router verifies the data packet and add own header (like sticker on the parcel) and forward it to next router.
Isn’t it interesting?
Now let’s see the next, that makes the sense widely different…
The difference between understanding how Computer Network works by Network Expert and by the Non-Technical Guy…
But how does actually packet sent by source reaches to the destination? What actual process carried out on data packet at every router? How does every router choose next router even though there are multiple routers are connected to it?
Is it easy to answer all these questions?
There are many more complex things happen over single packet (4B) before actually it reaches the destination. Everyone knows Computer network is sending the packet and getting it delivered it to the destination. But the expert knows every complex thing that happen in between source and destination.
That complex thing includes client, IP and MAC address, HTTP, DHCP, DNS, server…and list goes up. If I correlate…
Here the client is a person who receives and deliver the parcel.
IP and MAC address are the address assigned by the authority that defines every client independently…
HTTP is actually packed parcel.
DHCP assigns the address to every client before sending the parcel.
Server is courier service which monitor every client and work on their parcel.
These are the some computer networking term and I did my best to correlate it with postal parcel system and water drainage system. So that you can understand it easily and very well. We will see all the technical details about each computer networking term in upcoming articles on CSEStack.org.
Watch the following video. It gives you a visual impression How Computer Network Works actually… I watch it in every free time. It’s so awesome to give me the real sense about internet.
You may have multiple questions as we have not discussed computer network by the technical perspective. Computer network by the technical perspective, I will cover in upcoming articles. Though if you have any questions, use comment section bellow. I would like to discuss it over here.