Voice over IP is very exciting and more and more people are using it everyday.
IP语音很兴奋，而且越来越多的人每天使用。
Describe the impact of applications (Voice Over IP and Video Over IP) on a network.
描述基于网络的应用程序(IP音频和IP视频)的效果。
Advancing voice service over IP network may also reduce cost.
在IP网络上开展语音业务也同样可以降低成本。
Advancing voice service over IP network may also reduce cost.
在IP网络上开展语音业务也同样可以降低成本。
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