The technology in developing network protocol software relating to system kernels is always undocumented.
网络协议软件的开发技术因为涉及到操作系统核心，所以大多没有公开的资料。
The protocol suite is available as a software-only upgrade to the network infrastructure.
此套协议是用作对网络基础设施的纯软件升级。
The protocol suite is available as a software-only upgrade to the network infrastructure.
网站托管的两大元素是网络基础设施和用来操作网站的应用程序。
The protocol suite is available as a software-only upgrade to the network infrastructure.
网站托管的两大元素是网络基础设施和用来操作网站的应用程序。
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