Chapter 356 (2/2)
1. Data communication
Data communication is one of the most important functions of computer network. Data communication is a communication mode and communication service that uses data transmission technology to transfer data information between two terminals according to a certain communication protocol.
2. Resource sharing
Resource sharing is one of the main purposes for people to establish computer networks. Computer resources include hardware resources, software resources and data resources. The sharing of hardware resources can improve the utilization of equipment and avoid repeated investment of equipment, such as using computer network to establish network printer.
3. Centralized management
With the development and application of computer network technology, modern office means and management have changed. At present, there are many management information systems and office automation systems. Through these systems, we can realize the centralized management of daily work, improve work efficiency and increase economic benefits.
In fact, the term network is no stranger to these computer gods. At this time, the U.S. Defense Department already has research and application in this regard.
The US Department of defense believes that if there is only one centralized military command center, in case the center is destroyed by the nuclear weapons of the former Soviet Union. The national military command will be paralyzed, and the consequences will be unimaginable. Therefore, it is necessary to design such a decentralized command system - it must be composed of decentralized command points. When some command points are destroyed, other points can still work normally, and these decentralized points can be connected through some form of communication network.
In 1969, the advanced research projects administration of the U.S. Department of defense began to establish a network named ARPANET to connect several military and research computer hosts in the United States. At the beginning, ARPANET only connected four hosts, which was placed under the protection of senior secrets of the U.S. Department of defense in terms of military requirements. Technically, it did not have the conditions for outward promotion.
Many of the people sitting here have participated in the military program and are no strangers to networked computers. But the U.S. military spends enough money to build an aircraft carrier to complete the connection of four main engines. How much money does it need to achieve global promotion.
Moreover, the existing technology can not reach it at all, and there is no computer with such a huge amount of computation. Even if it is as strong as black cloud Gy1 computers, it is estimated that it can only drive dozens of computers, which is unrealistic for cross city office, let alone cross-border connections; Not at all. However, looking at baozixuan's vows, has he solved the technical barriers between WAN transmission; It can transfer information between multiple places and multiple machines.
Cisco has not been established, and there is no major technological breakthrough in network switches. It is more to transfer information between single machines, or to transfer information to the transfer station through a large industrial computer. Baozixuan, a global network leader for at least five years, can bring a revolutionary change to the computer industry in five years.
Although many scholars believe that the technology can not meet the requirements, they still agree with many views of baozixuan in the paper. If the existing technology is not up to the standard, it does not mean that it can not be realized in the future. As a pure academic paper, it is completely qualified. Looking at baozixuan, I feel that this technology is not far from success. This is the most exciting thing. Black cloud terror financial resources are enough to support the young man to do whatever he wants to do; They said no, what if the goal is achieved with the support of huge funds! Therefore, no one said anything ugly, mainly dare not!
In fact, there are many forward-looking topics about computers in baozixuan's mind. Why introduce the network! He is playing a game of chess. When the network in the United States becomes civilian and networks are set up around the world, Xiangjiang can get the qualification of a sub server, and the location has been selected and can be placed in Yulin Institute of technology; Therefore, a large constant temperature and humidity machine room was built at the beginning of the design.