Layer 1: Physical LayerData : Physical bitsEquipment : cables, fiber optic, ethernet hubsLayer 2 Data Link2A. MAC ( Medium Access control)2B. LLC ( Logical Link Control)Data : FramesEquipment : Switches , Bridges , Network Card.Layer 3 : Network LayerData : packetEquipment: FirewallsL2 Switch (hardware)L3 Switches (logical addressing)Layer 4–6 switch (LB,NAT,SBC)Layer 7 switch (CDN,IPPBX) Layer 1: … Continue reading L1, L2 ,L3 equipment and L3 vs L4 switches