What is the OSI Model?
The OSI model or Open Systems Interconnection model is a standard that provides a bases for how computer systems interact on the network from physical electrical impulses to interacting with the data on your screen. The OSI model is made up of seven layer:
| Layer | Name |
|---|---|
| 7 | Application |
| 6 | Presentation |
| 5 | Session |
| 4 | Transport |
| 3 | Network |
| 2 | Data Link |
| 1 | Physical |
Each layer plays an important part in getting data from one system to another.
Layer 1 - Physical Layer
Lets start at the bottom, the physical layer.
Sources
https://www.cloudflare.com/learning/ddos/glossary/open-systems-interconnection-model-osi/