Switchingpath delays are introduced because of the translation of each IP address within the packet headers.
因为针对每一个封包标头的IP地址进行转换，所以会带来一些交换路径的延迟。
2
The RDAC driver installed in domain 0 takes care of using the preferred path in normal circumstances and switching to the alternate path in case of interruption.
Between locations that exchange large volumes of data - say, Los Angeles and New York City - flow switching would establish a dedicated path across the network.