我们在写程序的过程中,有些时候需要知道一些电脑的硬件信息,比如我们写一些需要注册的程序的时候,就需要得到某个电脑特定的信息,一般来说,网卡的物理地址是不会重复的,-We are in the process of writing procedures, sometimes need to know some computer hardware information, such as we need to write the registration procedures for some time, it needs to be a computer-specific information, generally speaking, the physical address of network card is not duplicate,