解释基础交换的概念和思科交换机的作用。
Explain basic switching concepts and the operation of Cisco switches.
三层交换机接口指的是交换机系统与网络中的其它设备交换数据并相互作用的部分，在交换机系统中起着至关重要的作用。
The interface of three-layer switch is the component that exchange data between switch and other devices in network it play a key role in switch system.
浅析了集线器、交换机、路由器的工作原理、功能以及存在的不足，并对三者的功能和在网络中的作用进行了详细比较。
This article talks briefly about the principle, functions and deficiencies of the hubs, switches, routers, and also compares their functions and the roles in network.
浅析了集线器、交换机、路由器的工作原理、功能以及存在的不足，并对三者的功能和在网络中的作用进行了详细比较。
This article talks briefly about the principle, functions and deficiencies of the hubs, switches, routers, and also compares their functions and the roles in network.
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