OSI model and TCP/IP model

deksar

Can someone give a few ways in which the OSI model and the TCP/IP model are the same?

ZZOmega

Good question, understanding these concepts is key!

Both models divide internetwork communication into layers, which helps define how data is handled as it crosses the devices and media. The OSI model, created by the International Standards Organization(ISO), lost against the TCP/IP model(also known as the DoD model) in the battle to become implemented as the internet's standard suite of protocols. The OSI model is used today to promote understanding and help with troubleshooting because it divides the process into 7 layers, while the TCP/IP model specifies only 4.

[B][U]OSI Model       <- ->       TCP/IP Model[/U][/B]
  Application      7          Application
 Presentation      6          Application
   Session         5          Application
  Transport        4           Transport
   Network         3           Internet
  Data Link        2        Network Access
  Physical         1        Network Access

Cisco promotes the use of the OSI model as a learning tool because of its strict design and definitions. The TCP/IP model is promoted because its, well.... TCP/IP.


For more reading.

EDIT:

You might also find this interesting. The only two protocols in the OSI suite you will see in the CCNA curriculum is X.25 and IS-IS, which you really only need to know that they exist, and nothing more.