回想一下，Internet Protocol (IP)是传输协议(通常称为传输控制协议或TCP)下面的核心网络层协议。
Recall that the Internet protocol (IP) is the core network layer protocol that sits below the transport protocol (most commonly the Transmission Control protocol, or TCP).
为增加系统安全性和可扩展性，采用下一代互联网络的核心协议—SIP作为控制信令协议。
To increase the security and the expansionary of the system, it uses SIP as a core protocol.
通过分析蓝牙通讯协议模型及其核心思想，总结归纳了各层次相关项协议的作用和功能，为蓝牙家居控制网络的设计奠定基础。
Through analyzing Bluetooth protocol and summing up the role and function for each level agreements, it lays the foundation for home network design.
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