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1、 On the application of computer network technology and development Paper Keywords computer network technology development Abstract single computer run, in terms of hardware, software, causing great waste of it all. To establish a computer network can be realized, including expensive hardware, softwa
2、re and data sharing of resources, avoid duplication of development and investment. With the transmission in progress, the surge in demand for network interconnection, network software level, computer network technology will be more widely used. Computer network refers to the location of different fu
3、nctions of multiple independent computers and peripheral equipment, connected via communication lines, network operating systems, network management software, and network communication protocols, under the management and coordination, resource sharing and information delivery of computer systems. A
4、course of development of computer networks 1.1 Phase I: computer technology and communication technology combined with the first attempt The early 1950s, the U.S. ground-air defense system with radar and communication lines to remote measurement and control devices connected to the central computer
5、on the same start, this is the first attempt in todays world of computer technology and communication technology to come together, which for the computer The emergence of the network to do the technical preparation, and laid a sound theoretical basis. Later, in the early 1960s, U.S. airlines reserva
6、tion system is once again trying to connect through a central computer throughout all over the United States more than two thousand computers, in order to achieve a multi-user time-sharing and centralized control processing, computer center-line system (for the end of the line / network system), so
7、it was produced. 1.2 Phase II: the generation of packet switching 1960s, the Soviet Union during the Cold War context, the U.S. Department of Defense Advanced Research Planning Agency led to the development of a proposed new ARPA network against attacks from the former Soviet nuclear threat as the r
8、emote network (WAN began to be large wide range of distribution, (Advanced Research Projects Agency that the U.S. Defense Advanced Research Projects Agency ARPA in 1969 to establish the network, remote network is regarded as well-known, not only throughout the American continent for a big leap, but
9、also opened up with the other communication satellites for the European countries through the Internet computer network, ARPA network, computer networks have become the importance of the history of signs, of course this is only a single packet switched network, all want to connect it directly to the
10、 host on the end nearest point switch is connected to the size it has grown rapidly, to the mid-1970s, it was recognized that only a single network can not meet all of the communication problem. So ARPA began to study a lot of networking technology, which led to the subsequent emergence of the Inter
11、net. 1.3 The third stage: the formation of network standards Mid mid-70, along with the emergence of micro-computers and micro-processing technology, makes it a short distance between the computer communication requirements becoming increasingly clear that this (LAN Local Area Network was born. Form
12、ally entered the computer network requirements standardized network architecture era, United States, IBM announced the first (System Network ArchitectureSNA standard (ie, Systems Network Architecture, after which, DEC company also raised (Digital Network ArchitectureDNA standard (ie, digital network
13、 architecture in this period, ( ISO International Organization for Standardization has established a committee dedicated to serving the open system interconnection points technology, and have worked out a series of international standards to promote the development of computer networks tends to be m
14、ore standardized. 2 classification of computer network technology and its application 2.1 Local Area Network LAN Usually the common LAN means local area network, which is the most common, the most widely used as a network. LAN network has the advantage of less investment in various fields at home an
15、d abroad a wide range of applications received. First, (Ethernet Ethernet. Currently, the LAN (Ethernet Ethernet has maintained its mainstream position, commonly used Ethernet architecture are the following three kinds: 10BASE5 thick coax network structure to support the, 10BASE2 thin coaxial cable
16、network and support structure supports 10BASE-T twisted-pair network structure. Second, (Token Ring) Token-Ring. (Token Ring Token-Ring is the mid-1980s by a company created by IBM and TI, which has priority access control mechanisms and token transfer media access control approach has the advantage, and it has a high degree of adaptability and real-time, Even in the case of high load th
