The reachability of either host will flap on and off and be inconsistent.Ģ) Short answer: no. So if there are two hosts, both with the same MAC address, then the switch will update it's MAC table every time it receives a frame from either host. Upon receiving any frame, the source MAC is read and compared with the current switching table, and then added alongside whichever switchport it was received on. It bases this table on the source address of frames it receives during the normal operation of the network. So,ġ) In general, an Ethernet switch keeps a table of which MAC addresses are attached to which ports. It's possible for two hosts to have the same MAC, due to spoofing, a mistake during manufacturing, or willful negligence on the part of the manufacturer.
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