Internet originated from ARPAnet established by ARPA, the predecessor of DARPA, in 1969. The original ARPANET was mainly used for military research purposes. 1972, ARPANET first met the public and became the symbol of the birth of modern computer network. Another important contribution of ARPAnet in technology is the development and use of TCP/IP protocol family. ARPAnet has laid a foundation for the existence and development of Internet, and solved a series of theoretical and technical problems of interconnection between heterogeneous computer networks.
At the same time, the emergence and development of local area network and other wide area networks have played an important role in the further development of the Internet. Among them, the National Science Foundation (NSF) has the greatest influence, which established the National Science Foundation Network (NSFnet). It completely replaced ARPAnet as the backbone of the Internet in June 1990, but NSFnet's greatest contribution to the Internet is to open the Internet to the whole society. With the rapid growth of online traffic, in September, 1990, an advanced network and science company, ANS (Advanced Network &; Science Company). Its purpose is to build a T3 backbone network nationwide, which can transmit data at a rate of 45Mb/s, equivalent to transmitting 14 00 pages of text information per second. As of 199 1, all backbone networks of NSFnet have been connected with T3 backbone networks provided by ANS.
In recent ten years, with the development of society, science and technology, culture and economy, especially the development of computer network technology and communication technology, people pay more and more attention to the development and utilization of information resources, which greatly affects the development of the Internet. On the Internet, there are more than 65,438+000 businesses classified according to demand, including advertising companies, airlines, agricultural production companies, arts, navigation equipment, bookstores, chemical industry, communications, computers, consulting, entertainment, finance and trade, various shops and hotels, etc. It covers all aspects of social life and is the epitome of the information society.
Question 2: What is the Internet?
Question 3: What is the Internet, that is, a wide area network, a local area network and an international computer network composed of personal computers according to certain communication protocols? Internet refers to the result of connecting two or more computer terminals, clients and servers through computer information technology. People can send emails to each other, finish a job and have fun with friends thousands of miles away.
Question 4: What is the Internet? What does it do? Internet, officially translated as Internet in Chinese, is also called Internet. It is a global computer network, which uses a common language to communicate with each other. Once you connect to any of its nodes, it means that your computer is connected to the Internet. At present, Internet users have spread all over the world, and the number of people using the Internet has reached hundreds of millions, and the number of users is still growing at the same speed.
There are abundant information resources on the Internet, and we can easily seek all kinds of information through the Internet.
Question 5: What is the function of the Internet? The main functions can be summarized as network information service (WWW), electronic mail (e-mail), online discussion (mailing list, newsgroup, BBS), computer system remote login (TELNET), file transfer (FTP) and so on.
Internet is a collection of global information resources. There is a rough saying that the Internet is a logical network composed of many small networks (subnets), and each subnet is connected with several computers (hosts). Internet aims at exchanging information resources with each other, based on some common protocols, and is formed through many routers and public Internet. It is an information resource and resource sharing. Computer network is only the carrier of information dissemination, and the superiority and practicability of the Internet lies in itself.
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Internet originated from ARPAnet established by ARPA, the predecessor of DARPA, and was put into use in 1969. Since 1960s, ARPA has been providing funds to computer departments of American universities and some private limited companies to promote the research of computer networks based on packet switching technology. 1968, ARPA established the ARPAnet network project. The leading idea of this project is that the network must be able to withstand the test of failure and keep working normally. In the case of war, when a part of the network loses its working ability due to an attack, other parts of the network should be able to maintain normal communication. Initially, ARPAnet was mainly used for military research purposes, and it has five characteristics:
(1) supports resource sharing;
⑵ Using distributed control technology;
(3) adopting packet switching technology;
(4) using a communication control processor;
5] Using layered network communication protocol.
1972, ARPAnet first met with the public at the first international conference on computer background communication, which verified the feasibility of packet switching technology. Therefore, ARPANET has become the symbol of the birth of modern computer networks. Another important contribution of ARPAnet in technology is the development and use of TCP/IP protocol family.
1980, ARPA invested in adding TCP/IP to the kernel of UNIX (BSD version 4. 1). After BSD version 4.2, TCP/IP protocol became the standard communication module of UNIX operating system.
1982, the internet was formed by the merger of ARPAnet, MILNET and other computer networks. ARPAnet, as the early backbone network of the Internet, tested and laid the foundation for the existence and development of the Internet, and solved a series of theoretical and technical problems in the interconnection of heterogeneous computer networks.
1983, ARPAnet was split into two parts: ARPAnet and MILNET, which were purely military. In June, 5438+that year 10, ARPA took TCP/IP protocol as the standard protocol of ARPAnet. Later, people called the Internet with ARPAnet as the backbone network, and the TCP/IP protocol family was studied and tested in the Internet and improved into a convenient and efficient protocol family. At the same time, the emergence and vigorous development of local area network and other wide area networks have played an important role in the further development of the Internet. Among them, the most striking is the National Science Foundation (NSF), which established NSFnet.
From 65438 to 0986, NSF established six supercomputer centers. In order to enable scientists and engineers all over the country to share these supercomputer facilities, NSF has established its own computer network NSFnet based on TCP/IP protocol suite. NSF has established computer wide area networks divided by regions throughout the country, and connected these regional networks with supercomputing centers, and finally interconnected supercomputing centers. The composition of a local area network is generally composed of a group of computers that are geographically confined to a certain area, belong to an organization in management or have common interests in economy, and connect the main online communications in various areas. & gt
Question 6: 1. Does network mean the internet? What is the Internet? 1, the network is divided into local area network and Internet (or a metropolitan area network), and the Internet is a large local area network connecting the whole world.
2. Networks can be divided into LAN, MAN and Internet.
There are many kinds of home Internet access, and adsl is the most popular one at present. Adsl requires the following (telephone line, modem, super five-twisted pair, network card).
4, which means World Wide Web, is the abbreviation of World Wide Web.
5. The websites I pay attention to are Phoenix.com (featuring real information), Renren.com (social networking site) and joomla (making websites).
6. Commonly used browsers include IE (many rogue browsers in China include IE kernel), opera Firefox, google chrome safari and so on.
7, HTTP, Hypertext Transfer Protocol (HTTP) is the most widely used network protocol on the Internet, and it is a domain name suffix, international domain, China.
Question 7: What is the Internet? Internet is a collection of global information resources. There is a rough saying that the Internet is a logical network composed of many small networks (subnets), and each subnet is connected with several computers (hosts). Internet aims at exchanging information resources with each other, based on some common protocols, and is formed through many routers and public Internet. This is an era of information resources and resource sharing.
Simply put, it is the network.
Question 8: What is the Internet? Nowadays, with the rapid development of the Internet, it has become more and more a part of people's lives, and people affectionately call it the information superhighway. So, what is the Internet? I'll tell you today. Internet is a huge network. In our real life, there are three kinds of networks, the first is the telephone network. The second is the cable TV network composed of coaxial cables, so the last one is the Internet. These three networks are not strictly separated. With the rapid development of communication technology, they will be more and more closely linked. In layman's terms, the Internet is to connect isolated LANs together. Maybe you will ask, how do they communicate? This problem is also a problem encountered in the early stage of Internet development. Because there is no uniform standard for the hardware and software (including communication protocols) of the original local area network, when people want to connect them together, they find it difficult to communicate with each other. In this case, an international standards organization has emerged in the world, which is responsible for setting standards. These standards mainly refer to the communication protocol standards that have been successfully developed by some old computer companies in the past and regard them as part of this international standard. Gradually, this international standard has been accepted by more and more computer companies, and the development of the Internet has also made greater progress, and the geographical scope of connection has also become larger and larger.
Here, I can give the definition of the Internet: the Internet is to connect independent computers or relatively independent computer local area networks scattered around in the past, and realize a higher level of interconnection through certain communication protocols with the help of a telecommunications network that has developed to a considerable scale. In this Internet, some super servers are connected through high-speed backbone networks (optical cables, microwaves and satellites), while some smaller networks are connected with these giant servers through numerous branches. These connections include physical connections and software connections. The so-called physical connection refers to the connection between hosts using various communication means such as conventional telephone lines, high-speed data lines, satellites, microwaves or optical fibers. So what is a software connection? Computers in the global network use the same language to communicate. In other words, the same communication protocol is used.
Having finished the development history of the Internet, let me talk about how you entered the Internet world. Maybe you often hear some nouns, such as ISP, ICP and so on. They are: ISP = Internet Service Provider, ICP = Internet Content Provider. Their role is: ISP mainly faces small users who use modems to surf the Internet and helps them surf the Internet, so people call ISP Internet access. I can give you some company names. They are all ISPs, such as: Oriental Netscape, 269, 169, etc. ICP mainly provides online content, such as Sohu, Netease and Sina. In addition to some of the above companies, there are also some companies that are both ISP and ICP, such as Daqing Oilfield Information Port, Capital Online and so on.
If you are a modem user, you can get Internet service, Internet account, access number, email address and various technical support from ISP.
Question 9: What kind of network does the Internet belong to? Is it a wide area network?
Question 10: What does the Internet mean? Internet: Also known as the Internet, the Internet.
It connects the local area network and the wide area network all over the world to form a big network.