broadcast domain

基本解释

To further aid in scalable management, each SU has its own broadcast domain (SU-to-SU and SU-to-World communications are routed -- check for bottlenecks).
为了进一步帮助可伸缩管理，每个 SU 有自己的广播域（路由 SU-to-SU 和 SU-to-World 通信 —— 检查瓶颈）。
So a bridge splits the network into separate collision domains, but all the packets still get to go everywhere, so the bridged network is still a single broadcast domain.
所以网桥将网络分割为独立的冲突域，但所有的数据封包依然在整个网络里到处跑，所以使用了网桥的网络依然是个单一的广播域。
VLANs provide the ability to create virtual networks across a distributed network so that disparate hosts (on independent networks) appear as if they were part of the same broadcast domain.
VLANs 提供创建跨分布网络的虚拟网络的能力，这样就会出现不同的主机（在独立的网络上），如果它们是相同广播域的一部分。

The BCM7445 also features web domain security, an industry leading hardware security oversight to separate Internet services from premium broadcast content.
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