It is shown that the protocol capacity should be included in the criteria for evaluating the performance of a local network because it is related to the stability of the system.

文章指出，衡量干线形局部地区网络性能的指标，除吞吐率和延迟外，应当包括协议的容量，因为它反映了系统应付突发业务量的能力，从而直接反映了系统的稳定程度。

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The problem is that the original version of Internet Protocol (IPv4), on which the bulk of the Internet has been built thus far, has a fixed capacity of 4.3 billion IP addresses.

FORBES: The Internet Gets Its First Global Upgrade: Happy World IPv6 Day