In theory part, paper lucubrated SIP protocol and discussed detailedly entities of SIP network、layered structure of SIP protocol、structure of SIP message、process of session building、mechanism of media negotiation and several other key technologies used by SIP terminal: signal、media codec、RTP and QoS.
论文的理论部分深入分析SIP协议,对SIP的网络实体、SIP协议的分层结构、SIP消息的组成结构,会话建立过程,媒体协商机制以及SIP终端在通信过程所用到的几个关键技术:信令技术、音视频编解码技术、媒体实时传输技术和QoS保证技术做了详细的介绍。
参考来源 - 基于SIP协议综合通信终端的设计与实现·2,447,543篇论文数据，部分数据来源于NoteExpress
While consumer marketing is aimed at large demographic groups through mass media and retailers, the negotiation process between the buyer and seller is more personal in business marketing.
消费者营销的目标是大量的人口统计群体，主要通过大众传媒和零售商，而企业营销中买卖双方的谈判过程更加私人化。
In addition, media type is just one content negotiation type.
此外，媒体类型只是一种内容协商类型。
Identify, prescribe, and resolve common switched network media issues, configuration issues, auto negotiation, and switch hardware failures.
识别、指定和解决常见交换网络的介质问题、配置问题、自动协商和交换硬件故障。
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