[摘 要] 步入21世纪，信息化的要求促使企业从传统的经营管理模式，逐渐走向网络化。通信网络是承载各种业务、各种经营流程的核心基础，企业的各项业务将均围绕通信网络开展，各种集中系统、集中业务、集中平台都需要网络的支撑。 随着企业规模的越来越大，网络就显得越来越重要。越来越多的企业都组建了内部局域网，来实现自动化无纸办公等高效率、低成本的运营和管理。很多新成立的中小企业以及一些以前没有组网的老企业，现在也都纷纷组建企业局域网，企业中“无网不利”已经成为大势所趋。
[关键字] 以太网；vlan协议； nat协议；acl列表；资源共享
[Abstract] In the 21 century. Information to the requirements of enterprises from the traditional management model, gradually network. Communications network is carrying all kinds of businesses, all based on the core business processes, enterprises, the business will have on communications networks, all kinds of centralized systems, business focus and concentrate platform needs the support network. With the increasing scale enterprises, the network becomes increasingly important. More and more enterprises have set up an internal LAN, to achieve paperless office automation high efficiency, low cost of operating and management. Many of the newly established small and medium enterprises as well as some not previously a network of old enterprises, have now also organizing enterprise LAN, enterprises in the "no net negative" has become the trend of the times.
[Keyword] intranet;vlan protocal;;nat protocal;acl protocal; The sharing of resources
