Comparing TCP/IP With the OSI Model
Map the practical TCP/IP stack against the seven-layer OSI reference.
Two Maps of One Territory
The OSI and TCP/IP models describe the same networking reality in different ways. OSI has seven layers and is a detailed teaching reference. TCP/IP has four layers and is the practical model the internet runs on. Comparing them shows how the precise OSI functions group into the broader TCP/IP layers, helping you switch fluently between both ways of thinking.
Layer Counts Differ
The most obvious difference is the layer count: OSI has seven, TCP/IP has four. TCP/IP does not have fewer functions; it simply combines several OSI layers into single broader ones. Both models cover the same end-to-end job of moving data, just sliced at different levels of detail. Neither is wrong; they serve different purposes.
All lessons in this course
- The Four TCP/IP Layers Overview
- Comparing TCP/IP With the OSI Model
- How Encapsulation Wraps Your Data
- Tracing a Packet Through the Stack