The problem with multicast protocols is that they are still not very popular.

多点传送协议的问题是它们还不太普及。

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With multicast, a single stream can be picked up by each client, saving bandwidth.

有了多播，每个客户机能拾取单一数据流而节省带宽。

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Even for companies with multicast-enabled networks, there is a lack of management tools to ensure smooth operation.

甚至对拥有允许多播的网络的公司来说，也缺乏保证顺畅运行的管理工具。

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