The MAC is maintained and used by the Data Link layer (layer 2).
A MAC address
Routers don't use MAC addresses for routing. They use IP address.
Layer 1 of the OSI Layer Model does not support MAC addresses.
yes. thougth the nic is a layer 1 device its mac address is used in datalink layer
MAC
A layer 2 switch uses the MAC address to determine which port to switch the frame out of.
That is considered part of layer 2.That is considered part of layer 2.That is considered part of layer 2.That is considered part of layer 2.
transport layer
Network Interface Layer
The MAC sublayer is part of Layer 2 - Data Link Layer - but it is more correct to say that the MAC address is the physical address.
MAC
Data Link Layer...