Which department plans how to sell the products
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Which department recruits new staff
某种虚拟局域网的建立是动态的，它代表了一组IP地址。虚拟局域网中由叫做代理的设备对虚拟局域网中的成员进行管理。这个代理和多个IP结点组成IP 【7】 虚拟局域网。
Which department sends the products to the customers
Which department runs courses to teach the staff
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