transport layer
Layer 1 of the OSI Layer Model does not support MAC addresses.
IP addresses are used primarily by layer 3 (network layer) of the OSI model for routine purposes.
Layer 2 data link layer
Physical Layer of OSI model
ARP is protocol that doesn't fit nicely into the OSI model. It's not a layer two protocol because it utilizes Ethernet_II (Data Link) to get around with broadcast addresses (FF:FF:FF:FF:FF:FF). It's also not a layer three protocol because it doesn't provide routing capabilities. It maps layer 2 addresses to corresponding layer 3 addresses. So you could say it's 2.5. It is encapsulated within Ethernet_II frames.
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).
Application Layer
Application Layer
The "Internet" layer in the TCP/IP model more or less corresponds to the "Network" layer (layer 3) of the OSI model. Both have the task of connecting different networks, independently on the type of layer-2 network; and of providing addresses to every machine on the Internet.
Transport layer
The network layer address is not important to a transparent learning bridge because a transparent bridge operates at the data link layer (Layer 2) of the OSI model. It uses MAC addresses to make forwarding decisions and learn the network topology, while network layer addresses (like IP addresses) are not used in this process. Therefore, the bridge focuses solely on the MAC addresses to filter and forward traffic within the same local area network (LAN).
The transport layer in an OSI model is the layer that moves information or data between the network layer and the session layer. The Open Systems Interconnection model is a way of visualizing the processes that happen in communication and networking.