求翻译：传统的共享介质的以太网和交换式的以太网中,所有的用户在同一个广播域中，会引起网络性能的下降，浪费可贵的带宽；而且对广播风暴的控制和网络安全只能在第三层的路由器上实现。是什么意思？

Traditional shared-media Ethernet and switched Ethernet, all users in the same broadcast domain will cause the decline in network performance, wasting valuable bandwidth; and broadcast storm control and network security can only be in the third layer of the router.

Traditional shared media Ethernet and switched Ethernet network, all of the user in the same broadcast domain, can cause the network performance degradation, and waste valuable bandwidth, and the control of the broadcast and network security at the Layer 3 only on the router.

The traditional sharing medium ethernet and in the exchange -like ethernet, all users in the identical broadcast territory, can cause the network performance drop, wastes the valuable band width; Moreover to broadcasts the storm the control and the network security only can realize on the third rout

Traditional shared medium Ethernet and switched Ethernet, all users in the same broadcast domain will cause network performance degradation, and wasting valuable bandwidth; but for the broadcast storm control and network security can only be implemented at the third tier of routers.

正在翻译，请等待...