OSI 7层的介绍，以建立网路分层负责的观念，并说明现今运用最为广泛的乙太网路技术；
With network OSI 7 layers of introductions, divide one layer of a responsible ones idea in order to set up the network, prove that uses the most extensive Ethernet network technology;
公司在总经理的领导下，在全国城市和直辖市设立了6个办事处，实现各系统，各部门分层负责的管理制度。
Under the leadership of general manager, we established 6 offices in the national cities and municipalities, realizing various departments responsible for layered management system.
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