它在网络协议中是最低级的层次成分，而TCP/IP协议是与硬件无关的。

This is the lowest component layer of the Internet protocols, as TCP/IP is designed to be hardware independent.

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面向新的IEC61131 - 3标准，采用XML作为与硬件无关的PLC的编程数据具有极大的灵活性和扩展性。

Facing new IEC61131-3 standard, it is of huge flexibility and expansibility that the program language of PLC USES XML irrespective with hardware.

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很显然，您并不希望系统发生崩溃，但如果的确出现了这种情况，那么您将希望这是由于硬件故障造成的、而与您的操作无关，或者由于系统管理员的疏忽造成。

Obviously, you never want your system to crash but, if it does, you want it to be due to a hardware failure and nothing that you did or forgot to do as the systems administrator.

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