Layer 3: (Inter)Network Layer(P) Bridges multiple subnets to provide end-to-end internet connectivity between Application nodes Provides global addressing Transport Works across different link technologies Link Dififerent for each Physical Internet hopLayer 3: (Inter)Network Layer (IP) 7 4 3 2 1 Bridges multiple “ s u bn ets” to provide end-to-end internet connectivity between nodes • Provides global addressing 17 Works across different link technologies }Different for each Internet“hop” Application Transport (Inter)Network Link Physical