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The Internet has broken the conventional boundaries of time and space, transcended the shackles of national boundaries and races, and enabled the transmission and sharing of information and knowledge more quickly and conveniently. At the same time, it is also changing the way people work and study, live and play.
The Internet Connects the World as One" is a text in the comprehensive learning of Unit 6 of the second volume of the fifth grade, and the article briefly introduces the construction process of the Internet and its role in the "information superhighway". Networking computers around the world makes it possible for people to receive text, sound, and images from anywhere at any time.
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Human beings continue to innovate, in ancient times relied on post errands to travel long distances, and in modern times, they relied on the modern postal system of transportation, telegraph, computer network. However, computer networks are not the same in terms of the amount of information transmitted, the diversity of information, and the speed of transmission.
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The Internet connects computers around the world, what can people achieve on the Internet?
The Internet connects computers all over the world to calculate slip and slip, what can people achieve on the Internet? Internet, the English name is Internet, and it can also be transliterated as Internet (Internet), Internet Burning Chain Network. The Internet originated from the ARPANET, a network used by the United States for military purposes in 1969.
The Internet is a huge network connected by the network and the network, these networks are connected by a set of common protocols, through a large number of Internet hardware equipment, computers, mobile phones and other network products around the world, jointly connected to the network, to achieve resource sharing, data processing, etc., the current society has been inseparable from the existence of the Internet. Commonly used devices in the Internet include routers, switches, etc., which exchange and transmit data through network protocols. The Internet is not the same as the World Wide Web, which is a global system based on hypertext links to each other, and is one of the services that the Internet can provide.
The Internet has made modern life more convenient. Internet banking, e-reading, online shopping, car navigation, web chat, playing games, etc., the Internet has become inseparable from people's lives.
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In ancient times, people wanted to send greetings to distant relatives and friends, and most of them had to rely on the long-distance travel of the post post. In modern times, trains, ships, airplanes and other means of transportation have gradually appeared, and the world has a postal system, through which letters, newspapers and periodicals can be transported to all parts of the world. In the thirties of the 19th century, Morefa slipped the telegraph.
Later, Bell invented**. The advent of the telegraph has made the transmission of information more convenient and faster than before. In 1984, a multi-computer was born, and then quickly became popular.
In 1993, the United States put forward a plan to build an "information telling highway" to network computers all over the world so that people could receive words, sounds, and images from anywhere at any time. Now, sitting in front of a computer at home, friends thousands of miles away can receive your e-cards in an instant. The computer network connects the whole world as one, and "the end of the world is next to each other" is no longer a dream.
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A relatively general definition of a computer network is as follows: a system that uses communication lines to connect geographically dispersed computer systems and communication equipment with independent functions in different forms, and realizes resource sharing and information transmission with well-functioning network software and protocols.
In fact, we can simply understand the computer network from two perspectives, one is all the hardware and software infrastructure that makes up the network; The other is a collection of all the services running on this network.
The Internet refers to the world's largest computer network.
We surf the Internet every day, in fact, we are using the Internet services, of course, there are many such services, our most commonly used web services, email services, FTP services, etc.
Initially, a network was a small network with only a few machines connected, and then small networks appeared in other places, and then small networks were connected to each other to form a larger network.
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The Internet has broken the conventional boundaries of time and space, transcended the shackles of national boundaries and races, made information and knowledge more rapid and conveniently transmitted and shared, and also changed the way people work, study, live and play.
This text reviews the major developments in the form of information transmission from ancient times to the present day: in ancient times, the post traveled long distances; In modern times, the postal system relied on means of transportation; Modern, telegraph, **contemporary, radio, television and computer networks.
The Internet Connects the World as One is a text in the sixth unit of comprehensive learning in the second volume of the fifth grade.
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Kindness.. The answer is to choose the gateway I said this when I was learning.
A gateway is also known as an inter-network connector or protocol converter. The gateway implements network interconnection at the transport layer and is the most complex network interconnection device, which is only used for the interconnection of two networks with different higher-level protocols. The structure of a gateway is similar to that of a router, except for the interconnection layer.
Gateways can be used for both WAN and LAN interconnections. A gateway is a computer system or device that acts as a translator. A gateway is a translator between two systems that use different communication protocols, data formats or languages, or even completely different architectures.
Unlike bridges, which simply convey information, gateways repackage the information they receive to fit the needs of the destination system. At the same time, the gateway can also provide filtering and security features. Most gateways run on top of the OSI Layer 7 protocol – the application layer.
Everyone knows that to go from one room to another, you have to go through a door. Similarly, sending information from one network to another must pass through a "gate", which is the gateway. As the name suggests, a gateway is a "gateway" between one network and another.
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Routers are generally different networks to make them communicate.
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