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Layer 3 i.e, network layer of the OSI model is used to IP addressing.
Networking layer of the OSI model
layer 3 , network layer .
Layer 3 - network addressing.
DHCP runs at the application layer of the OSI model.
Physical Address
Network Layer - Does path determination and logical addressing.
layer 3
Layer 4 usually uses segments, layer 3 are packets, layer 2 are frames. Layer 4 uses either tcp (SYN and ACKS) and UDP (connectionless) with port numbers
The OSI model has seven layers whereby each layer has its function. The Data Link Layer is responsible for addressing data messages so that they reach their destination correctly.
Data Link
The Physical layer is responsible for the actual hardware connection. The physical addressing is handled by the Data Link Layer.