Difference Between TCP IP and OSI Model

By : Neha Dhyani

Updated : Mar 15, 2022, 12:17

The establishment of a connection between the sender and receiver, as well as the smooth transmission of data, is made easier with computer network models. The OSI Model and the TCP/IP (Transport Control Protocol/Internet Protocol) Model are the two most widely used computer network models.

TCP/IP is the communication protocol suite that connects network devices to the Internet, while OSI is a reference model that outlines the functions of a networking system. We'll look at these two models in depth in this essay. We'll go over their layers and the differences between the OSI and TCP IP models.

What is OSI?

The OSI model is a logical and conceptual model for network communication that is utilized by systems that are capable of interconnection and communication with other systems. The Open System Interconnection (OSI) Model also defines a logical network and covers computer packet transport using several levels of protocols.

It has seven layers:
1. Physical
2. Data Link
3. Network
4. Transport
5. Session
6. Presentation
7. Application

What is TCP IP?

TCP/IP is a protocol that specifies how a computer should connect to the internet and how data should be transmitted between them. When many computer networks are connected, it assists in the creation of a virtual network.

Transmission Control Protocol/Internet Protocol (TCP/IP) is a combination of TCP and IP. It was created as a model for providing a very stable, end-to-end byte stream over an unreliable internet network. It has four layers:
1. Network Access
2. Internet
3. Transport
4. Application

Difference between TCP IP and OSI model

TCP/IP stands for Transmission Control Protocol/Internet ProtocolOSI is an acronym for Open Systems Interconnection
It is a protocol-dependent concept that allows hosts to connect over the internet.It's a protocol-independent generic standard that acts as a communication bridge between the end-user and the network.
The approach is horizontal.Takes a vertical approach.
It allows computers to communicate with one another, but it does not standardize hardware components.It allows various hardware devices, including routers and switches, to be standardized.
It has four layers.It has seven layers.
It is significantly more reliable than OSI.It is less reliable.
In this model, the transport layer does not guarantee packet delivery.The transport layer ensures that packets arrive at their destination.
The minimum header size of the TCP/IP is set as 20 bytes.The minimum header size of the OSI is set as 5 bytes.
The presentation and session layers are distinct.The application layer contains both the session and presentation layers, which are not separated.
There are no apparent distinctions between interfaces, services, and protocols in TCP/IP.Services, interfaces, and protocols are all clearly distinguished in the OSI model.

The differences between TCP IP and OSI Model have been discussed in this blog. The OSI model is a generic one based on the functions of each layer. TCP/IP, on the other hand, is a protocol-based model. Hope you found this to be informative.

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FAQS on Difference Between TCP IP and OSI Model

Q.1) What's the main distinction between TCP IP and the OSI Model?

The main distinction between the OSI and TCP IP Models is that the OSI is a conceptual framework, whereas TCP/IP is a collection of communication protocols. The OSI model has seven layers, each with its own set of functions, whereas the TCP/IP model has four layers.

Q.2) Which model is better TCP IP or OSI?

If appropriate documentation, definition, and modularization are important, the OSI paradigm should be preferred over the TCP IP approach. However, if the implementation, stability, and security of the network are more important, the TCP/IP model should be preferred over the OSI model.

Q.3) Why are we using the TCP IP instead of the OSI model?

The OSI model specifies how communication should be carried out. The model was created first, followed by the protocols for each layer in the OSI model. TCP IP protocols, on the other hand, form the foundation for the Internet. TCP/IP is thus a practical model.

Q.4) Why TCP IP is used more than the OSI model?

OSI is a model that has been developed theoretically. The availability of appropriate technologies is not considered in this approach. It lays forth the rules for how to communicate, but it isn't practical. TCP IP, on the other hand, establishes the foundations for the Internet. It is a model that is more practical.