It was the early 1970s, the U. S. Defense Department implemented a network, called ARPAnet, that was designed so that seven if part of its physical structure were destroyed, information could still be sent to any remaining destination.

• 在70年代早期，美国国防部完成了一个网络，叫做ARPAnet，该网络设计的目的是，即使网络的某一具体部分遭到破坏，信息仍能够传递到任一个残存的目标点。