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.
The layer that filters packets based on MAC addresses is the Data Link layer, which is the second layer of the OSI model. This layer is responsible for node-to-node data transfer and handles error correction from the physical layer. Devices such as switches operate at this layer, using MAC addresses to forward frames to the correct destination within a local area network (LAN).
MAC