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Sophisticated networking is possible because each of your networked devices has both a MAC and an IP address.

正是由于你的网络设备拥有MAC地址和IP地址才让这复杂的网络传输变得可能。

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NICs and MACs are important pieces of the answer, but your network must learn to pair a MAC address with the IP address for the same machine.

网卡和MAC地址只是这个答案中重要的部分，你的网络还必须知道如何匹配同一台设备的MAC地址和其IP地址。

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We tried it then and it couldn't have been easier, logging in while connected to your home network flips the switch based on IP address or MAC address, and then it worked at home or on the go, no password necessary.

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In this case, the cyber identity of this file would be a full set of its cyber coordinates in the IP subspace: the computer IP address, its MAC address, a Port number associated with the particular application, and the file name would constitute the full set of cyber coordinates, singularly identifying a cyber object (our file) in cyberspace.

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