在一个2节点集群中，当一个节点发生故障或网络连接中断，每个节点都会充当主要节点并开始与外界交互。
In a two-node cluster, when one fails or the network connection snaps, each node believes that it is the master and starts interacting with the outside world.
全球最大的数据连接装置提供商思科已经开始销售服务器，这震惊了惠普这个设备商，惠普也开始涉足网络连接生意。
Cisco, the world's largest maker of data-networking gear, has started to sell servers. That spurred HP, a vendor of these machines, to push into the networking business.
随着网络连接的更加便捷，以及更多官方认可的教育机构开始从事网上教育，情况已经大有不同了。
With faster Internet connections and accredited institutions embracing online education, a lot has changed since then.
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