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。
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。
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。
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