Question about MAC Addresses.

Infinite_3D · Post by **Infinite_3D** » Fri Dec 27, 2002 2:15 am

Me and my friend are arguing about Mac addresses.

OK, please correct me if i am wrong but isn't a MAC address unique to the network card you are using? If that is true, doesn't it mean that if you get a new network card, you get a new MAC address.

So what I am trying to say is:

New network card = new MAC address?

My friend says a MAC address is unique to the COMPUTER. He says that IF you change your network card, your MAC address will remain the same.

Who's right?

compkid87 · Post by **compkid87** » Fri Dec 27, 2002 4:26 am

I believe MAC address is the identification number on modem, which is also what your ISP uses. This number is probably on a sticker underneath your modem, which means the network card doesnt have anything to do with MAC address. Please correct me if i'm wrong.

crazyjw1971 · Post by **crazyjw1971** » Fri Dec 27, 2002 5:09 am

Change NIC's and your ISP see's a different MAC address. I know Comcast records the MAC address of your modem AND your NIC. When I switched NIC's in the same PC, I was charged for an EXTRA ACCOUNT

! I had to jump through hoops to prove to them that I was only using ONE PC at that time!

therealcableguy · Post by **therealcableguy** » Fri Dec 27, 2002 7:47 am

Each network device,network card,modem,router,switch has a unique Media Access Control address.Change network cards and your MAC address for your PC changes.If your modem is swapped the new modem will have a different MAC address.

http://whatis.techtarget.com/definition ... 06,00.html