yes. thougth the nic is a layer 1 device its mac address is used in datalink layer
If you mean the MAC address, that's a layer-2 concept.
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.
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.
That is called the MAC address.
Source MAC-address
Final Destination Address
the source Layer 2 address of incoming frames
Destination MAC: 0030.8517.44C4 Default gateway: 172.16.1.1
A layer 2 switch uses the MAC address to determine which port to switch the frame out of.
The MAC is maintained and used by the Data Link layer (layer 2).
MAC address is fixed to the hardware device (for example a network card) and can not be changed. IP address is assignable. The default IP address for a device can be computed by converting the four right-most numbers of the MAC address from hex to decimal.The MAC address refers to the physical address assigned by the Network Interface Card manufacturer. Example - 10.03.d5.f3.45.fc , where are an Internet Protocol address is given to a computer when it gets connected to the network. Its divided into four parts , separated by fullstops.
Switches store the MAC addresses in an internal database called MAC Address Table. The entries in that table can be addresses learned by the switch or that can be entered manually by the switch administrator. This table is analogy to a router's routing table, only a switch operates at layer 2 whereas the router operate at Layer 3.