How Internet Work ?

Do you guys know how the internet works? How does the internet run? Who owns the Internet? How does the Internet reach us? Why do operators give us different offers, why does anyone get more speed, someone gets less internet, who has made the internet, then in this post, we will read about this topic today, you should read this post completely so that you will know how How the internet works, how we can use it and how the internet reaches us.

How internet works
How internet works

So friends, in today's time every country, every person of the world is connected with each other. Today with the help of the internet, we can connect with anyone anytime, But have you thought about how the Internet works, You would have thought that the internet would run via satellite Or you might have thought that the network is spread everywhere so it's working, But you might not know that the internet runs on 99% optic fiber cable, Now you might be thinking that I run internet from mobile, What type of cable is installed on the mobile?

From the data center, a signal could be sent to the satellite via an antenna, and then from the satellite, a signal could be sent to your mobile phone via another antenna near to you. However, this way of transmitting signals is not a good idea. Let's see why. The satellite is parked nearly 22,000 miles above the earth's equator, so in order for the data transmission to be successful, the data would have to travel a total distance of 44,000 miles. Such a long distance of travel causes a significant delay in receiving the signal.

More specifically it causes huge latency which is unacceptable for most internet applications so Well, it is done with the help of a complicated network of optical fiber cables, which connect between the data center and your device. Your phone could be connected to the internet via cellular data or any Wi-Fi router, but ultimately at some point, your phone will be connected to this network of optical fiber cables To be more specific, it is stored in a solid-state device within the data center. This SSD acts as the internal memory of a server. 

Let's see how this is done. Before proceeding further we should first understand an important concept which is the concept of an IP address. Every device that is connected to the Internet whether it is a server a computer or mobile phone is identified uniquely by a string of numbers known as an IP address. Any letter sent to you reaches you precisely because of your home address. Similarly in the internet world, an IP address acts as a shipping address through which all information reaches its destination.

Your internet service provider will decide the IP address of your device and you are able to see what IP address your ISP has given to your mobile phone or laptop. The server in the data center also has an IP address. The server stores a website so you can access any website just by knowing the server's IP address.

However, it is difficult for a person to remember so many IP addresses. In such cases additional pieces of information, host headers are used to uniquely identify the website. However, for the giant web sites like Facebook.com or YouTube.com the entire data center infrastructure will be dedicated to the storage of the particular website.

To access the internet we always use domain names instead of the complex IP address numbers. From where does the internet get IP addresses corresponding to our domain name requests. If you know a person's name, but don't know their telephone number you can simply look it up in a phone book. The DNS server provides the same service to the internet.

Your internet service provider or other organizations can manage the DNS server. Let's have a recap of the whole operation. You enter the domain name, the browser sends a request to the DNS server to get the corresponding IP address. After getting the IP address, your browser simply forwards the request to the data center, more specifically to the respective server.

Once the server gets a request to access a particular website the data flow starts. The data is transferred in digital format via optical fiber cables, more specifically in the form of light pulses. These light pulses sometimes have to travel thousands of miles via the optical fiber cable to reach their destination. During their journey, through tough terrains such as hilly areas or under the sea.

These visuals show how the laying of optical fiber cables is done with the help of a ship. A plow is dropped deep into the sea from the ship, and this plow creates a trench on the seabed and to which places the optical fiber cable. In fact, this complex optical cable network is the backbone of the Internet. These optical fiber cables carrying the light are stretched across the seabed to your doorstep where they are connected to a router.

The router converts these light signals to electrical signals. An Ethernet cable is then used to transmit the electrical signals to your laptop. However, if you are accessing the Internet using cellular data, from the optical cable the signal has to be sent to a cell tower, and from the cell tower, the signal reaches your cell phone in the form of electromagnetic waves. Since the Internet is a global network has become important to have an organization to manage things like IP address assignment, domain name registration, etc this is all managed by an institution called ICANN located in the USA.

One amazing thing about the internet is its efficiency in transmitting data when compared with cellular and landline communication technologies. This post you are reading from the Google Data Center is sent to you in the form of a huge collection of zeros and ones. What makes the data transfer in the internet efficient is the way in which these zeros and ones are chopped up into small chunks known as packets and transmitted. Let's assume these streams of zeros and ones are divided into different packets by the server where each packet consists of six bits.

With this information, the packets are routed towards your phone. It's not necessary that all packets are routed through the same path and each packet independently takes the best route available at that time. Upon reaching your phone the packets are reassembled according to their sequence number. If it is the case that any packets fail to reach your phone and acknowledgment is sent from your phone to resend the lost packets. Now compare this with a postal network with a good infrastructure, but the customers do not follow the basic rules regarding the destination addresses.

In this scenario, letters won't be able to reach the correct destination. Similarly in the internet, we use something called protocols for the management of this complex flow of data packets. The protocols set the rules for data packet conversion, attachment of the source and destination addresses to each packet and the rules for routers etc for different applications the protocols used are different.

We hope this post has given you a good understanding of how the internetworks, more specifically about the amazing journey of data packets from the data center to your mobile phone.

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