OSI Layers Flashcards
1
Q
Layer 1
A
Physical
Cables, bits, voltages, network cards, Hub
2
Q
Layer 2
A
Data Link
MAC addressing, switches, frames, error detection
3
Q
Layer 3
A
Network
Routing, IP addressing, Firewall
4
Q
Layer 4
A
Transport
End-to-end connections, reliability (TCP/UDP)
5
Q
Layer 5
A
Session
Manages sessions (start/stop conversations)
6
Q
Layer 6
A
Presentation
Data format (encryption, compression, encoding)
7
Q
Layer 7
A
Application
User interface, APIs, app access to network services
