The IP layer, in turn, provides services used by the Internet Control Message Protocol (ICMP) and Transmission Control Protocol (TCP).

反过来，ip层又提供由网际控制报文协议(ICMP)和传输控制协议(TCP)使用的服务。

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This is a small application that bridges the TCP/IP layer to a Serial (COM) port.

这是一个串口和以太网口的透传转换程序，目前只是支持单个串口。

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How to achieve the security communications of lightweight IP layer is a problem that has got people's attention.

如何实现轻量级IP层的通信安全，则是一个令人关注的问题。

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And in yet another layer of IP complexity, server owners often incorporate software provided by third-party developers, and in some cases also hire people to write code to add customized features to the server.

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In parallel, define a security architecture and migration strategy that provides security through browsers, Secure Sockets Layer and passwords in the short run, and gets you started on PKI by deploying technologies such as IP Security virtual private networks and the Secure Multi-purpose Internet Mail Extensions e-mail standard.

CNN: Easy-to-use PKI is key to cryptography's success