现在网络结构都变成三层了!这可是先进的网络方案啊,购买方案者别让厂商们给蒙了,别再买Client/Server方案啦……难道今后所有的网络结构都必要是三层结构吗?让我们来认识一下三层结构及其用途。实际上三层结构在60年代末期产生于主机系统,起源于OLTP应用软件设计,它的使用对象是用户多,交易时间短、交易量大,有通用数据库的 Now that the network structure has become three layers! This is an advanced network solution, ah, do not let the vendors buy the plan to Mongolia, do not buy Client / Server program ... ... Is it that all future network structure is necessary to three layers Structure? Let us understand the three-tier structure and its use. In fact, the three-layer structure was generated in the host system in the late 1960s. It originated from the OLTP application software design. It was used by many users, with short transaction time, large transaction volume, and a general-purpose database.