有兩種方式
1。共享內存（ShareMemory） ，在系統內開闢空間，對於系統狀態未知的情況比較適用，比如木馬等
2。C/S模式，通常是通過Socket實現，其中對於Socket的解釋在Wiki上看了一段，感覺寫的很好，很有意思，直接原封摘過來，如下
The term Internet sockets is also used as a name for an application programming interface (API) for the TCP/IP protocol stack, usually provided by the operating system. Internet sockets constitute a mechanism for delivering incoming data packets to the appropriate applicationprocess or thread, based on a combination of local and remote IP addresses and port numbers. Each socket is mapped by the operational system to a communicating application process or thread.
