云计算是由分布式计算、并行计算、效用计算、网络储蓄、虚拟化、负载均衡等计算机与网络计算相结合的产物,是继1980年代后网络领域有一大转变。云计算是互联网时代相关服务的增加、使用以及交付方式,常通过网络提供模拟化资源,这种模式能够有效提供可利用的、便捷的网络服务。 Cloud computing is a product of the combination of computer and network computing, such as distributed computing, parallel computing, utility computing, network saving, virtualization and load balancing. It is a major change in the network field after the 1980s. Cloud computing is the increase, use and delivery of related services in the Internet age, and often provides simulated resources through the network. This model can effectively provide available and convenient network services.