Layer 2: Link Layer Framing and transmission of a collection of bits into individual messages sent across a Application single"subnetwork"(one physical technology Transport Might involve multiple physical Link links(e.g, modern Ethernet) Physical Often technology supports broadcast transmission(every node connected to subnet receivesLayer 2: Link Layer 7 4 3 2 1 Framing and transmission of a collection of bits into individual messages sent across a single “ s u bn etwork” (one physical technology) Might involve multiple physical links (e.g., modern Ethernet) Often technology supports broadcast transmission (every “ n ode” connected to subnet receives) 16 Application Transport (Inter)Network Link Physical