一.当代网络建设的特色 90年代的网络在技术、设备、市场、应用上与80年代完全不同。 首先,90年代的计算机网络在技术上从80年代的专有纵向走向了开放式、横向联接。异种机联网,成了计算机网络的基本要素,许多国外大型计算机硬件公司的网络部门,开始独立出来,他们的技术先进与否,很大程度上是看其是否能与异种机联网。在产业上,一批专门研制生产网络操作系 I. Characteristics of Contemporary Network Construction The network of the 1990s has been completely different from the 1980s in terms of technology, equipment, market and application. First, computer networks of the 1990s moved technically from proprietary verticals of the 1980s to open, horizontal connections. Heterogeneous networking has become an essential element of computer networks. Many of the major computer hardware companies in the world have started to work independently of their networks. Their advanced technology is largely dependent on whether they can network with heterogeneous machines. In the industry, a group of specialized development and production network operating system