ANSWERS: 2
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MAC addresses can only be detected on the same network segment. Unless you have a piece of software installed on your system that reads your mac address and sends it to a central location.
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Here is a great free new program to totally change the identity (all revealing info) about your laptop anytime you wish with a couple of clicks... Enjoy! http://www.download.com/Technitium-MAC-Address-Changer/3000-2085_4-10554920.html?tag=mncol&cdlPid=10830256 Technitium MAC Address Changer allows you to change Media Access Control (MAC) Address of your Network Interface Card (NIC) irrespective to your NIC manufacturer or its driver. It has a very simple user interface and provides ample of information regarding each NIC in the machine. Every NIC has a MAC address hard coded in its circuit by manufacturer. This hard coded MAC address is used by windows drivers to access Ethernet Networks (LAN). This tool can set a new MAC address to your NIC, bypassing the original hard coded MAC address. Technitium MAC Address Changer is a must tool in every security professionals tool box. Technitium MAC Address Changer is coded in Visual Basic 6.0. Version 5 added features like HTTP proxy settings in presets, removes unknown network adapters from registry, and support for Windows Server 2008 and Windows Vista SP1.
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