4、18.12 Robustness 健壮性 One type of robustness is simple robustness, in which the protocol adapts to node and link fail-stop failures. 一种健壮性类型是简单健壮性，即协议能适应节点和链路的异常终止错误。
Another type is self-stabilization. ...... 另一种类型是自我稳定。
Another type is Byzantine robustness. The network can continue to work properly even in the face of malfunctioning nodes,whether the malfunctions are caused by hardware problems or by malice. 还一种类型是Byzantine健壮性。在出现故障节点时，不管故障节点是由硬件问题还是由恶意引起的，网络都能继续正确工作。
Following are some intreresting points to consider when you goal is to make a system robust. .......... 当你的目标是使系统变得强健时，下面是一些值得考虑的要点： ．．．．．．
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