由于网络系统的开放性和共享性，加之网络管理存在很大问题，计算机网络系统存在很大漏洞。
Because of the open network system and sharing, there is a big problem in network management, computer network system has a lot of bugs.
在多媒体领域，开放式计算机网络(ocn)是用于计算机通信的一项新通信业务。
In multimedia area, Open computer Network (OCN) is a new communication business used for computer communication.
在计算机互联网技术的推动下，控制网络要满足开放性的要求，因而从现场总线走向控制网络是一个必然。
The computer interconnecting network technology pushes the control network should satisfy the opening requirement, in the consequently, the local bus should be changed to the control network.
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