文件 /etc/hosts 包含指定给主机名的地址（包括一个 IP 地址、全限定主机名和主机名）。

The file /etc/hosts contains addresses that are assigned to hostnames (including an IP address, the fully qualified hostname, and the hostname).

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鉴于当前网络存在的不足，未来其发展趋势应该是一个全ip的具有服务质量保证、支持移动应用的网络。

From the shortcomings existing in the classical network, the future network should base on the all IP network and provide quality of service and mobile support.

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本文介绍了全IP核心网的概念以及无线网、骨干网、信令网的演进。

This paper introduces the concept of all IP core network, then discusses the evolution of wireless network, backbone network, signalling network.

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