Introduction: Earth’s new discoveries are driving civilization forward. The internet is one of the most important inventions in modern science. People have brought the modern world into their hands with the help of the internet. Can’t go through a day without the internet these days. People all over the world can connect with each other instantly through the internet. Due to the Internet, the information technology system has undergone a great change. The life of people has become easier. Internet technology has reduced both distance and time. The importance of the internet is increasing day by day from individual life to society and state life. Present-day Bangladesh is progressing through the use of Internet technology.

What is the Internet:
International network management is abbreviated as the internet. The most talked about term of the present time is the internet. International computer network services are also called the Internet. Bringing all the computers in the world into one system is called the internet system. Connecting one computer to another computer is the main task of the internet. Thus the information technology of the country is connected with the information technology of another country through the internet system. People from any part of the world can connect with each other by using internet services. Talking, photo sharing, submission of research papers, business papers, education, etc. various services are available with the help of the internet. All computers, modern mobile phones, and laptop technology in the world have been united by Internet service. The Internet connects computers and mobile phones scattered like a net. The Internet system has tied all the people of the world together.

Accessories for Internet use:
Without internet services, today’s world would come to a standstill in no time. A computer, laptop, or mobile is the first thing needed to take advantage of the Internet. A router is needed to hold the network. In the case of mobile users, the mobile tower and the necessary megabytes must be purchased from the mobile company by controlling the network, with a specific amount and time of use. However, if there is a government telephone connection line, then an internet connection is available through a router. A modem was used to access the internet. Science is making new inventions to make internet services easier. This service can be delivered to people’s doorsteps and multi-faceted development of the country and the world will be achieved.

Internet Procedure:
In order to receive internet service, the wave flow from the main server must be connected to your computer or mobile. By connecting from one server to another server; Larger Internet services are developed. Generally, From the heart of the country it reaches the heart of the big cities and from there it spreads out to different places. Internet service; The first thing to do when it comes to profit is to network. The connection to this network is made by modem or optical fiber. on the computer; In addition to using a modem, a WiFi connection can be used to get internet services. A computer network in a certain volume through a router will receive In case of using internet service on mobile, the SIM used by the company to get internet service Data mode must be turned on. Web address to indicate the address in the case of receiving Internet services. the term is used. By entering the required address or web address, the information about the desired subject is available through the Internet connection system.

Classification of the Internet:
A variety of technologies are used to provide Internet services. The Internet can be divided into four categories on the basis of technical usage, namely- optical fiber, wifi or wireless connection, Telephone Line, and Computer Modem. Smaller users use optical fiber or fiber Internet. This method is called Fiber to the Home method. Wi-Fi or a wireless system is connected to get internet service through mobile. Medium or large users of Users in this category require a high-speed network, using gigabytes of the Internet. The Internet is usually on a computer or laptop using a modem. It is possible to connect.

Internet usage history:
The scientific world was the first to use the Internet to store its own country’s data and protect confidential communications. In the 1960s, the US military intelligence agency conducted experimental efforts to use the Internet in some universities and research laboratories. Especially between the world’s two largest nuclear powers, the Soviet Union and the United States. During the Cold War, the need to use this internet technology was realized. American scientists in 1969 The Internet began to be used as an alternative to the telephone and was then called MILNET. American universities began research to make this system more effective and versatile. In 1984, “Nesphenate” for the general public of the United States Enables name communication. Its usefulness was so great that in a short time, network systems were developed in many countries of the world beyond the United States. In 1993, an attempt was made to commercialize the Internet system and a central network was built. It is becoming possible to provide Internet services to billions of people in the world by modernizing the central network’s technical aspects. Internet for military management development Although early attempts at innovation Currently it is being used in multi-dimensional work

Benefits of using the internet:
Today’s world is unimaginable without the use of the internet. The Internet has some relation with daily life. Through the use of technology, great changes have come in people’s lives. The Internet plays a special role in the field of education. If we are interested in knowing about any topic, we can get a rough idea about it by using the internet. Internet service is very effective in the study and research work at the university. If students are unable to come to school-college-university due to special reasons in the country or any region, the necessary educational materials are sent through e-mail. The Internet is now the easiest medium to send research papers from one country to another country. The use of the internet in the military field makes a country stronger. Just as the Internet is useful in obtaining advanced information to protect against foreign enemies, the Internet is also effective in protecting the secret communications of one’s country. The trading system is now completely internet based. Sending purchase orders from one country to another through the Internet, monitoring the progress of work, and knowing whether the products are being produced as per the demand or not are easily known. An owner can easily run multiple businesses by setting the prices of the store’s products through the use of special technology. All accounts of one’s business can be compared easily through the internet sitting at a distance. The internet has made it possible to talk to loved ones, send pictures and view pictures through video calls. For emergency services within the country, arrangements can be made by calling a special number or sending information through the Internet. The Internet is currently the most popular means of seeking advice from police, doctors, fire services, and lawyers. Internet-based news media has developed for news delivery. We can know any news in the world through the internet. Listening to music, listening to poetry recitation, and watching movies is an easy way of entertainment. Various websites which are used as social media can be used through the internet. The entire responsibility of office management is now online dependent. Internet service has taken over the responsibility of storing thousands of files. In no time we can find the required files by using the internet. There is no substitute for the internet for online shopping. Even if you need to sell a product, you can buy it at home. Even if you need to sell a product, there is a platform. Things like bus, plane, train ticket, and hotel booking can be done remotely by using the internet. Banking management has increased speed and financial transactions have become easier. The use of the Internet has also reduced the incidence of check fraud and money laundering. If the Internet service is stopped for a moment, the financial loss of the world is unimaginable and irreparable. After all, the Internet is one of the most essential things in today’s world.

Information Technology and Internet:
Without information technology services today’s world cannot move forward in any way. Information technology is inextricably linked with our daily life. Internet is being used for various services including e-mail, messages, electronic fund transfers, and teleconferences. We have to depend on internet management to save information. Through the use of the Internet, we can communicate with each other as well as exchange information. Human-to-human expression exchange, emotions, and feelings are all being exchanged through the internet. The use of information technology services is increasing to make people’s work easier, as a result of which people’s dependence is increasing day by day. The internet system is very useful to reduce the pressure on people. Although the internet is used as an area of free movement of information technology, people must be more dynamic than the internet, otherwise, the internet will take control of people.

Internet usage in Bangladesh:
In order to explain the context of internet usage in Bangladesh, it is necessary to get an idea about the time of computer usage. Bangladesh Computer Council started the journey of computer use in the sixties. Since then, the use of computers in various fields has been increasing. Computer typing was started instead of typewriters in various offices and courts. On November 11, 1993, the Internet was first used in Bangladesh. Initially, the internet was used by establishing connections between several offices. Although the journey of the Internet started through offline technology, the first online Internet was introduced in 1996 through VSAT. The internet system of Bangladesh is spread through the ISP named ISN. In the beginning, the system was limited to the hands of BTCL, i.e.It was under control of the government. Later, private companies in the country and outside the country brought internet facilities to Bangladesh.

Internet Usage in Bangladesh Economic Sector:
In order to analyze the current economic flow of Bangladesh, Internet services cannot be excluded. Especially the young generation of Bangladesh is directly connected with the new business sector that is being created by the Internet. Bangladesh has found its way to success from the information technology revolution that has taken place in the world in the last two decades. The Internet plays a special role in keeping pace with the world and becoming economically self-sufficient. Government-sponsored internet services up to Union. University admission registration, job application, import, and export system, teaching in educational institutions, storage of research papers, health services, and financial transactions are all dependent on the internet. The young generation is using technology services as a means of economic growth. Through e-commerce and outsourcing, young society is making a satisfactory contribution to the economy of Bangladesh and their contribution to the economy is increasing day by day. A young man can easily earn money sitting anywhere in the country with a computer and internet connection. Due to the fact that all government and private services are online based, the demand for the internet has increased and also many young people have become self-reliant at the marginal level. The people of Bangladesh have easily accepted this incredible medium of technology services, as a result of which the people of this country are enjoying the benefits, as a result of which our country has become a developing country. Till the year 2025, about 100 million people in Bangladesh will be directly connected to the Internet.

Disadvantages of the Internet:
Each thing has its good as well as its bad side. It depends on the user which thing he consumes through the internet. Pornography is a place of interest for young people. Online gambling, playing games for money, engaging in good faith relationships with unknown men or women, spreading rumors, etc. are all kinds of bad ways of the internet. Viruses are being used to delete computer programs and data, resulting in millions of computers being damaged every year. Using social media to target any person and make bad comments about a person’s dignity can be easily undermined. As the internet has brought relief in people’s lives, some unexpected events are forcing people to be embarrassed, yet in today’s world, it is not possible to imagine a day without the internet.

Conclusion:
Since the industrial revolution in Europe, various scientific discoveries have contributed significantly to the changes in civilization. The Internet is the 2nd greatest invention of the 2nd century. Over time the use of the internet has increased based on which people’s lifestyle has changed. There is no sector of the country where the internet is not being used. Internet services are bringing all the difficult tasks to people very easily. It is not possible for the Internet to make the third world a developed world. The Internet is the most popular and reliable medium for education, business, commerce, medical care, communication technology, and sharing of personal information. The invention of the Internet has created a great revolution in the world.