Renaissance northern Italy is thought to be the cradle of the cradle of the IP system, so the concept is not a new one.

文艺复兴时期的意大利北部被认为是知识产权制度的摇篮，因此知识产权并不是一个新的概念。

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The above scenario involving a requester-server channel works fine as long as the IP address of the sender system (192.168.1.1) is unchanged.

上述场景涉及到请求方-服务器通道，只要发送方系统的IP地址(192.168.1.1)不变，该通道就能工作正常。

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Typically, network programs require information about all the network interfaces and IP addresses available on the system.

通常，网络程序需要了解系统中所有有关网络接口和IP地址的可用信息。

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Currently,and since around nineteen eighty, the addressing system has been IP version 4.

VOA: special.2011.06.13

D. scientists and engineers into the workforce, many of whom have received little or no instruction regarding the nature of the IP system and their role in it.

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Specifically, ICANN is responsible for coordinating the assignment of protocol parameters, overseeing the domain name system, allocating IP-address space and managing the root-server system.

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In all other cases the system tracked IP address only.

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