Number of layers?	7
• Physical Layer, Layer 1	Transmission & Reception of raw bit streams over a physical medium.
• The Data Link Layer, Layer 2	Provide node to node communication between two directly connected nodes.
• The Network Layer, Layer 3	Structuring and managing many ECU or Multinode network including addressing, routing & traffic control
• The Transport Layer, Layer 4	responsible for end-to-end communication of data packets.
• The Session Layer, Layer 5	Controls the connection between nodes & ECU
• The Presentation Layer, Layer 6	Ensures that the data received is usable format and can be transmitted to application layer
• The Application Layer, Layer 7	Human-computer interaction layer, where applications can access the network services

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