OSI Layers
Layer 1 (Physical)
- Electrical signaling over a physical link
Layer 2 (Data Link)
- Data framing and administration of communication over a single data link
- Point to point connection
- Shared media LAN with only one possible path between two station
Layer 3 (Network)
- Routing across an internet with multiple alternative routes
- Or a subnet that offers alternative routes, but these rarely exist