Linked by Amjith Ramanujam on Fri 15th Aug 2008 04:15 UTC, submitted by computerishcat
The traditional market share numbers would say that Linux is currently at less than 1%, but some more recent numbers suggest that it might, in fact, be almost even with the Mac. This all brings the question of how many Linux users are there really? Unfortunately, we may never know. Certainly, there is no way of knowing currently, but it should be possible to at least get a rough estimate.
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Member since:
2005-07-06
Unfortunately you cannot. MAC Addresses are not transmitted past the first router. After that only IP is transmitted (not counting special cases like packet encapsulation for VPN traffic and such).
Once on the local segment ARP is used to match up IP address (or whatever protocol is being used if not IP) to MAC address.