Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

I have some difficulties understanding the main difference between the OSI model and the TCP/IP model.

MY question is: what is the difference between the OSI model and the TCP/IP model, is the OSI model the father of the TCP/IP model?

share|improve this question

closed as not a real question by RedGrittyBrick, Mokubai, 8088, Nifle, soandos Sep 3 '12 at 18:26

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

1  
See superuser.com/a/424439/52492 Also IP was worked out in 1973, OSI model published in 1984. –  RedGrittyBrick Sep 2 '12 at 19:40

2 Answers 2

A network layer model is simply a way of thinking about network protocols. It categorizes the features of a network protocol into layers that depend on the features of the lower layers. Thus it's useful to talk about the data link layer, which is responsible for moving the raw data, depending on the physical layer, which makes the network hardware accessible to upper layers.

The OSI model does not define specific protocols. It provides a model for designing network protocols that are strictly organized into layers. Protocols that reach across layers are frowned upon.

The TCP/IP model differs from the OSI model in three important ways:

  1. It defines fewer layers, with slightly different definitions, though the way OSI layers map to TCP/IP layers is pretty straightforward.
  2. TCP/IP does not demand strict layering. Cross-layer protocols are considered reasonable if they simplify implementation.
  3. Some core protocols are essential parts of the TCP/IP model. Indeed, the model named after two of them.
share|improve this answer

They do basically the same thing. Main difference is that OSI model has 7 layers and TCP/IP protocol suite has 4.

They were both developed in the late 70's so i wouldn't say that OSI is the father of TCP/IP.

Give this a read.

Check this as well.

share|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.