网桥监视在每个网络上传的所有数据包，当它发现一个网络上的包到另一网上的主机时，就将其传送过去。
The bridge looks at all the packets flying by on each of the networks and when it sees a packet on one network destined for a host on the other the bridge copies it over.
网桥监视在每个网络上传的所有数据包，当它发现一个网络上的包到另一网上的主机时，就将其传送过去。
The bridge looks at all the packets flying by on each of the networks and when it sees a packet on one network destined for a host on the other the bridge copies it over.
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