Multiple mac addresses
I learned this neat getmac trick on youtube that is supposed to output your mac address. The youtube video showed how to do this but the person making the video only had one physical address (i.e. mac address) listed for his where I show three different addresses http://screencast.com/t/MUouIOvbcUoE. Should I be concerned?
Nothing to worry about, i have a more than one listed. If you have multiple Nics or VM's then they will also have a mac assigned. Its all ok
ASKER
How do I tell which one is the one for my wireless laptop?
Which one is for the CAT5 cable?
What other one might there be? I have no VM's running but I do use a software package called dropbox?
Which one is for the CAT5 cable?
What other one might there be? I have no VM's running but I do use a software package called dropbox?
ASKER CERTIFIED SOLUTION
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Thank you, and I was pleased to assist you. ... .Thinkpads_User
•Media Access Control (MAC) Address Spoofing
Media Access Control (MAC) spoofing attacks involve the use of a known MAC address of another host to attempt to make the target switch forward frames destined for the remote host to the network attacker. When a single frame is sent with the source Ethernet address of the other host, the network attacker overwrites the CAM table entry so that the switch forwards packets destined for the host to the network attacker. Until the host sends traffic, it does not receive any traffic. When the host sends out traffic, the CAM table entry is rewritten once more so that it moves back to the original port.
Use the port security feature to mitigate MAC spoofing attacks. Port security provides the capability to specify the MAC address of the system connected to a particular port. This also provides the ability to specify an action to take if a port security violation occurs.
http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_example09186a00807c4101.shtml