| Layer Number | Layer Name | Protocol | Protocol Data Unit | Addressing |
|---|---|---|---|---|
| 5 | Application | HTTP, SMB, SMTP, etc | Messages | n/a |
| 4 | Transport | TCP/UDP | Segment | Ports |
| 3 | Network | IP | Datagram | IP Address |
| 2 | Data Link | Ethernet, Wi-Fi | Frames | MAC Address |
| 1 | Physical | 10 Base T, 802.11 | Bits | n/a |