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A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment.
26
votes
What can my university see if they have my MAC address?
They're requesting your MAC address because they're using MAC filtering to control access to the WiFi network. That does not in and of itself constitute the ability to see what you're doing when you …
11
votes
Accepted
How can Bank of America tell that I'm logging in on a computer I haven't used with them before?
I'm willing to bet that they don't actually identify the computer, they just send you a persistent cookie once you've successfully logged in, and as long as your browser returns that cookie, they know …
15
votes
Can a website still detect my real MAC address even if I use different virtual machine each ...
The question in the original title of your post ("Can a website still detect my real MAC address even if I use different virtual machine each time I visit the website?") is different than the question …