随着企业内部网、企业外部网和因特网的迅猛发展,网络变得越来越普遍,但结构却越来越复杂,而且现在涌现出大量的各种各样网络的应用、硬件、平台和协议,各个企业或部门不得不投入一个或多个网络管理者去维护和控制其网络。 With the rapid development of intranet, extranet and Internet, the network has become more and more common, but the structure is more and more complex, and now a large number of applications, hardware, platforms and protocols of various networks have emerged , Each enterprise or department has to invest one or more network managers to maintain and control its network.