Do you think about internet service? When you chat with someone on the web or send mail, have you ever wondered how many different computers are working
together to complete these tasks? You are sitting on the table with your PC, on the other place your friend is ready with a computer to contact you. Here has more computer in the gap between your friend’s computer, which is filling the gap between you and your friend’s computer. In this way, another computer connected to a network across the whole world, and that is the Internet service. But how are these different machines able to establish relationships within themselves? Let’s go and visit all these things from near.
What is the internet service
Global communication has become much better now all of this is credit, whose name is the Internet service. Within the last 20 years, the spread of the web has spread to 210 countries. Many poorest countries of the world have also linked to this net.
Most of you people, including me, think that the word internet service means going online. But to speak the truth, it’s nothing only a standard computer network. Think of a road that wrapped around the whole world. Just as the traffic goes on the path to the destination, just as the data goes through various computers to its destination. And this is the original foundation of the Internet. The Internet service is a system of connecting a different computer together (your home computer, office computer, school college computer).
One computer connected to another computer in various ways. Any computers connected by old copper cables, and fiber-optic cable (which sends data between the vibrations of the light), or attached to the wireless connection (wireless connection means we understand wireless, it connects through radio waves) and many computers Connected to satellites. This way we can enjoy instant messaging, email service, or download mp3 music files.
What is the real work on the internet service?
The Internet service job is very easy, and it just transmits data from one place to another. The primary functions of the machines that have created the Internet service by combining them and delivering. To compare the real world, it can compare to the postal service.
Postal service transmitted from one place to another. It does not matter where came from the letter, or what written in the letter. The letter is empty, but there is no problem in postal service. His job is to reach the letter, and he will reach. The Internet service works the same way.
Internet services like postal service, which contain much information, can be moved from one place to another. If any data is transmitted, then the Internet will complete it. You send an email or a message, and there is no transaction problem on the Internet. That is why the data transfer process will help to complete by the web. Based on the sources of these data transfers, we are looking for new uses. As the two European investors created Skype, they brought the phone to the net. They created a program where our words could become data, and they continued to communicate through sharing. But it was not possible to create a separate internet for Skype by sharing our talk directly.
How are internet service data transmitted?
The Internet serves as a telephone network. But carrying data on the Internet and calling on the phone line is a different matter. When you call a friend, a direct connection (or circuit) opened between you and your friend on your telephone. As long as you connected to the phone, the circuit is open till then. Circuit switching is a method known to log into another telephone with a telephone. The electronic telephone exchange system controls who will hear and who will send.
Friends, think of a circuit switching is an inefficient method to set up a network. When you connected with your friend on the phone, you will not be able to relate to anyone on that line. (Remember, you are typing an email, it may take a couple of hours to type, and at this time if you can not send any mail to anyone at this stage?)
You are speaking very slowly in the telephone or taking a long blank or talking Going to the phone went to bring the coffee mug. So you are not sending any information, but then your phone is connected to your friend’s phone. You are charging the bill for every second, and you do not have to speak or say that the phone is connected and no one else can call it on that line. So circuit switching can never be an ideal network. What type of network is the Internet service, data carries?
Packet switching for internet service
Sometimes using the circuit switching method to carry internet data. For example, if you connect to the Internet service using dial-up connectivity (where your computer dials a telephone number to reach your internet service provider, it works like a regular phone call). You used the circuit switching method to come online. So no one can call you till someone connected. And you have to pay for every second to stay connected. Instead, your net connection will work at the turtle speed.
But most of the internet data is carried out in an entirely new way called packet switching. Imagine that you want to send an email to any of your Indian friends. Here your Indian friend and you do not have to be connected directly to get this full mail once. After sending your letter to packet switching, it divided into several chunks. And each of these pieces is called packets. Each packet tagged on its own, and they can travel to differents. When the fragments reach their destination, they merge again, so that they can appear as emails.
Packet switching method is much more efficient than circuit switching method. You will never need to connect with anyone completely. So you’re not blocking someone’s line. Anyone else may use the same line at the same time. Certain packets will reach your address exactly. Since packets reach different directions through the packages, there are no obstacles. As a result, many fast speeds are available.
How does packet switching work?
Before understanding how packet switching works, you need to know how circuit switching works. Suppose you live in America and plan to come to Bangladesh. You are thinking of picking up your building with your accessories, thinking that you are carrying your entire house from one end of the world to another. What do you have to do?
First, you have to see a road that allows you to travel quickly. Then you need some trucks. You will need an individual ship to cross the sea. Think of how difficult it is to get the whole thing. You will be back for a few days to carry so many things together because your destination will slow down very much. Again if the other person tries to come to the same street, he will also get stuck. The circuit switching method works the same way. And this approach is used by a telephone call.
Now imagine another situation. Assume that you took off your building and every brick numbered. Each block stuffed the envelope and sent it on your way to your destination. Some travel by the ship and others by the sky. When all the bricks arrive together than the number of blocks will be created again, and again the former building will be built. Since blocks have traveled with differents roads, no street jam will form. Others can use the same way at the same time.
Packet switching works in this way. When you email or browse a site with a browser, all the data divided into several packages, and it spreads over the Internet.
How do computers work on the Internet?
There are hundreds of millions of computers across the web. Not all of them do the same thing. Some of these computers only collect information and send information when requested. These machines are called servers. The devices that store any documents referred to as file servers. The servers that contain your mail that is the mail server. The servers that contain web pages are called web servers. There are plenty of millions of servers on the internet.
The computers that collect data from the server, called client computers. When you enter the Internet service to check mail, your computer is the client, your ISP (Internet Service Provider) is the server, and the mail comes from the mail server. The number of customers on the Internet service is more than the number of servers, almost billion.
When two computers are interacting with each other, it is called Peers. If you are instant messaging or share photos with your friend, then it is peer-to-peer (P2P) communication. Sometimes your computer behaves as a client and sometimes acts as a server. Suppose you’ve sent a photo to your friend, then your computer worked as a server (for sending photos ). And your friend’s computer will work as a client (access photos). If your friend sends pictures, his computer will serve as a server (for sending photos ) your computer will now act as a client (access photos).
Apart from just server and client, there is another central computer which is another part of the Internet service. And its name is Router. It only helps to connect between different systems. If there are more than one computer in your home or school or office, then the router helps everyone log into the Internet.
TCP / IP
It is not easy to carry data on the web such as easy to carry the house bricks. Internet data is not possible by any person such as you or I can control. There are numerous data transmissions in the net every day – drafting approximately 3 billion emails and lots of traffic to download and upload various data across 250 million websites in the world. Now the question is if all of these data sent to packets and if someone does not have any control, how can they reach the real destination without losing these packages?
The answer is TCP / IP or Transmission Control Protocol / Internet Protocol. This system only allows all packets to delivered to the destination. You can say, two in one system. In the world of computers, “protocol” means a standard that everyone believes, and ensures that all things conclusively reached. The question arises in your mind that what does TCP / IP work? Let’s know.
Internet Protocol or IP is a simple addressing system. In your house, all the device on the web has a different IP. When every device has a different IP, the device easily identified and it is possible to send packets accordingly. IP addresses primarily inserted in some numbers. A comma or colon use to separate the numbers.
The matter is a little different from the website. The name is used to remember the site rather than the IP easily. Such as (shushanta.com). The name of this system is DNS or domain name server. After entering the domain name into a browser, the computer starts searching for this IP, and when the IP found the site opened from the web server.
The IP is mainly of two types. One is IPv4 and another IPv6. There is a four-digit digit in IPv4. Such as 220.127.116.11 or 18.104.22.168. But today there are no new IPv4 addresses in the fast-growing Internet world. So a new system developed that is IPv6. It is much longer than the IPv4. 123a: b716: 7291: 0da2: 912c: 0321: 0ffe: 1da2 is an example of IPv6. [Learn more about IP address]
Another part of this control system is Transmission Control Protocol (TCP). This system determines how to send a packet from an IP to another. This system combines receipt packaged and if a package lost when posting, then re-send it.
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