Protocols·3 / 5
TCP/IP - the language of the internet
~6 min read
TCP/IP is a layered model. From low to high:
| Layer | Job | Example |
|---|---|---|
| Link | Physical signals | Ethernet, Wi-Fi |
| Internet | Routing packets | IP |
| Transport | Reliability, ports | TCP, UDP |
| Application | What you actually use | HTTP, DNS, SMTP |