Is the MAC address stored on the motherboard?

The MAC address is stored in the NIC ROM which in theory cannot be changed without reflashing the chip which can’t be done in situ by the bios. It may be that the NIC is part of the motherboard and is sharing the main boards EEPROM though.

Can two device have same MAC address?

No two devices on a local network should ever have the same MAC address. If that does happen, both devices will have communications problems because the local network will get confused about which device should receive the packet.

How do I change my physical MAC address?

Right-click or long tap on the adapter for the network card that you want to change. Choose Properties from the menu that opens up. In the Properties window that pops up, select the Advanced tab. Select Network Address in the list displayed under Property, and type the new MAC address value on the right side.

How many bits make up a MAC address?

48 bits
Historically, MAC addresses are 48 bits long. They have two halves: the first 24 bits form the Organizationally Unique Identifier (OUI) and the last 24 bits form a serial number (formally called an extension identifier).

Can you change motherboard MAC address?

Yes, if it’s not integrated, then replacing the NIC would change the MAC address. Alternately, if the Ethernet is on the motherboard, there MAY be a socketed ROM that holds the MAC address. Swapping that would also work. However, the easier hack is to change the MAC by software before connecting to the network.

Where is the MAC address burned into?

MAC Address is a unique 6-byte (48-bit) address that is usually permanently burned into a network interface card (NIC) or other physical-layer networking device and that uniquely identifies the device on an Ethernet-based network.

How do I replace my NIC card on my computer?

In This Article

1. Assemble your materials.
2. Shut down Windows, turn off the computer and unplug it.
3. Remove the cover from your computer.
4. Find an unused expansion slot inside the computer.
5. Remove the metal slot protector from the back of the computer’s chassis.
6. Insert the network interface card into the slot.