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本文主要是对广东省高速公路公司计算机联网方案的探讨。整个网络系统由省公司的主干网（FDDI）和子公司的子网（光纤以太网）组成。省公司与子公司的网络互连通过专用通信网。
This article mainly discusses the plan of computer networking in Guangdong Expressway Company. The entire network system consists of the provincial company’s backbone (FDDI) and the subsidiary’s sub-network (Fiber Ethernet). Provincial companies and subsidiaries of the network interconnection through a dedicated communications network.