What is the Internet and the history of Internet development
What is a network?
A network is a system that connects multiple computers or other network devices so that they can communicate and exchange data with each other. The network can be a network of different scopes such as a local area network (LAN), a metropolitan area network (MAN), and a wide area network (WAN). Through the network, people can communicate remotely, share resources and information, conduct online transactions and other activities.
What is the history of web development?
The history of network development refers to the evolution of computer networks from their birth to the present.
The development of the web can be traced back to the 1960s. At that time, the US Defense Advanced Research Projects Agency (ARPA) began to study a new type of computer communication technology called packet switching technology. This technique divides data into small chunks (ie, packets) and transmits them over the network. The emergence of this technology marks the birth of computer networks.
In the following decades, computer networks continued to grow and develop, and various types of networks appeared, such as ARPANET, Internet, local area network, etc. The development of network technology enables people to communicate and exchange information more conveniently and efficiently, and promotes the arrival of the information age.
From the perspective of key technologies, the development of the Internet can be divided into three stages:
packet switching technology
Packet switching technology is a data communication technology that divides data into multiple small blocks (that is, packets) and transmits them through the network. In packet switching technology, data is divided into multiple small blocks, and each small block has information such as destination address and source address. These small pieces are transmitted into the network, travel through multiple routers and transmission lines, and finally reach their destination and reassembled into complete data.
Compared with traditional circuit switching technology, packet switching technology has higher efficiency and flexibility. Since the packet switching technology can transmit multiple data packets at the same time, it can better utilize the network bandwidth and improve the network transmission speed. In addition, packet switching technology also has better fault tolerance, because even if a data packet has an error during transmission, it will not affect the transmission of other data packets.
TCP/IP technology
TCP/IP is a network protocol, which is one of the core protocols of the Internet. The TCP/IP protocol was developed by the US Defense Advanced Research Projects Agency (ARPA) in the early 1970s to enable communication between distributed computer systems. The TCP/IP protocol divides data into small pieces (i.e., packets) and transmits them across multiple networks before finally reaching its destination and reassembling into complete data. The TCP/IP protocol has the advantages of high efficiency, stability, and security, and has become a standard protocol for Internet communication.
The influence of the TCP/IP protocol is very far-reaching. It promotes the development of computer networks and the advent of the information age. The TCP/IP protocol laid the foundation for the development of the Internet and became the standard protocol for Internet communication. At the same time, the TCP/IP protocol has also promoted the development of computer science and network technology, and has become an important part of the field of computer science.
web technology
Web technologies refer to the technologies and tools used to create and run web applications. Web technologies include HTML, CSS, JavaScript, web servers, web browsers, etc., which together form the basis of web applications.
The emergence of Web technology marks the birth of Web applications. Web applications refer to applications that are accessed and run through a web browser, such as e-commerce websites, social media, online games, etc. Web application has the advantages of cross-platform, easy to maintain, and easy to expand, and has become one of the main forms of modern application.
The impact of Web technology is also very far-reaching. It has changed people's way of life and work, enabling people to obtain information, communicate and trade more conveniently and efficiently. Web technology has also promoted the development of the Internet and has become one of the main forms of Internet applications. At the same time, Web technology has also promoted the development of computer science and software engineering, and has become an important part of the field of computer science.
From the perspective of evolution history, the history of network development can be divided into six stages:
ARPANET (1969)
ARPANET is the first packet-switched network established by the US Defense Advanced Research Projects Agency (ARPA) in 1969. The network was originally established to solve communication problems within the U.S. Department of Defense, but was quickly expanded to other agencies and universities. The establishment of ARPANET marked the birth of computer networks and also opened the embryonic form of the modern Internet.
The influence of ARPANET was very far-reaching. It promotes the development of computer science and network technology, and promotes the arrival of the information age. ARPANET also laid the foundation for the development of the Internet later and became an important part of the Internet.
Internet (1983)
ARPANET evolved and is the world's largest computer network, connecting computer systems around the world.
World Wide Web (1990)
Invented by Tim Berners-Lee, it became one of the main standards for pages and resources on the Internet.
Mobile Internet (2007)
With the emergence of smart phones, the mobile Internet has risen rapidly and become an indispensable part of people's daily life.
Internet of Things (2010)
The Internet of Things connects various devices and objects through wireless sensors and the Internet, allowing them to realize autonomous communication and control, changing people's production and lifestyle.
Blockchain Technology (2008)
Blockchain technology is the technical basis behind cryptocurrencies. Its decentralization and strong security features make it widely used in the financial field and other industries.