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互联网(internet)又称因特网或网际网,是指广域网、局域网及单机按照一定的通讯协议组成的国际计算机网络(图1),是人类社会重要的信息基础设施,对经济社会发展和国家安全具有战略意义。互联网产生于20世纪六七十年代,旨在解决当时资源共享问题。从技术角度看,它至少有三个特点:一是全球性;二是网上每一台主机都要有一个唯一的“地址”;三是所有的主机必须按
Internet (Internet), also known as the Internet or the Internet, refers to an international computer network composed of WANs, LANs and stand-alone devices according to certain communication protocols (Figure 1). It is an important information infrastructure for human society and has an important role in economic and social development and national security. Strategic significance The Internet originated in the 1960s and 1970s, aiming to solve the problem of resource sharing at the time. From a technical point of view, it has at least three characteristics: First, the global; second, each host must have a unique “address”; Third, all hosts must press