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I find a field Memory in the result of ifconfig command. I am not quite clear about its meaning. By googling, I get some hint from unSpawn's post on this thread that Memory indicate what memory segment is in use. Does that mean a memory-mapping is used to map the NIC to the specified memory segment?

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up vote 3 down vote accepted

Yes. The network card's onboard memory buffers are mapped into memory so the CPU can copy data into and out of them as the card sends and receives packets.

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