意思就是和保险丝一样，熔断之后，就出现了断点，断网之类的事情。
RFC 2914
3.1. Preventing congestion collapse.
The Internet protocol architecture is based on a connectionless end-to-end packet service using the IP protocol. The advantages of its connectionless design, flexibility and robustness, have been amply demonstrated. However, these advantages are not without cost: careful design is required to provide good service under heavy load. In fact, lack of attention to the dynamics of packet forwarding can result in severe service degradation or “Internet meltdown”.
This phenomenon was first observed during the early growth phase of the Internet of the mid 1980s [RFC896], and is technically called “congestion collapse”.
这种现象也被称之为拥塞坍塌，也是说网络变得拥塞，而完全影响网络性能。