How about this also? What happens if you could build a sniffer computer to put on a LAN with a duplicate and valid MAC address. And you build the sniffer to not respond to ARP requests, therefor it does not show in the ARP table with different IP and duplicate MAC. Would this sniffer then happily receive all the data meant for the other duplicated PC without detection by viewing the ARP table.
---------- Post added at 20:47 ---------- Previous post was at 20:41 ----------
Quote:
Originally Posted by tavon
MAC Addresses are controlled by the Institute of Electrical and Electronics Engineers, it is a 48 bit hexadecimal address the first 24 bits are assigned by the Institute of Electrical and Electronics Engineers as a vendor code, the other 24 bits are for the vendor to give to each Network Interface Card a unique address. there cannot be two Network Interface Cards with the same MAC address.
of course there is MAC address spoofing which can clone a MAC address which can complicates things.
Two hosts with the same IP address on the same network would cause a conflict as Jon T has pointed out.
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Its the "can complicate things" I am interested in.