OSI vs TCP/IP Model - Naukri Code 360

Introduction

The major reason we can publish a blog and get it to millions of readers so quickly is because of networking. In the area of computer networks, the complete picture is investigated. The communication between systems is handled via computer networks. Simultaneously, it examines how the information supplied from the source should reach its destination in the most efficient manner possible. It's like living in a congested metropolis with a lot of traffic.

Network Models

To establish communication between two separate processes on two different hosts, we must ensure that the network responds to the requirements and operates as if there is no network and both processes are running on the same host.

The architecture, components, and design utilized to establish communication between the source and destination systems are described in the network model. Protocol stacks, protocol suites, network stacks, and network protocols are all aliases for network models. There are two network models to choose from. Let us take a look at a few of them.

Model of Open Systems Interconnection (OSI)
Transmission Control Protocol/Internet Protocol (TCP/IP Model)

Comparison of OSI and TCP/IP Network Models

It's now time to compare the two reference models we've learned so far. Let's start with the parallels that both of these models share.

Some similarities between the OSI Reference Model and the TCP/IP Reference Model are listed below.

Both have a layered design.
Similar functions are provided by layers.
They're both protocol stacks.
Both are examples of reference models.

Diagrammatical Comparison of OSI and TCP/IP Network Models

OSI Reference Model and TCP Model Comparisons

Difference Between OSI and TCP/IP Network Models

Below is a diagrammatic comparison of the major differences between the OSI Reference Model and the TCP/IP Reference Model.

OSI(Open System Interconnection)	TCP/IP(Transmission Control Protocol / Internet Protocol)
OSI is a protocol-independent, generic standard that serves as a communication bridge between the network and the end-user.	The TCP/IP paradigm is built on standard protocols that the Internet has grown up around. It is a network communication protocol that allows hosts to communicate over a network.
The transport layer assures packet delivery in the OSI paradigm.	The transport layer in the TCP/IP paradigm does not ensure packet delivery. Even so, the TCP/IP approach is more trustworthy.
Follows vertical approach.	Follows horizontal approach.
There is a Presentation layer and a Session layer in the OSI model.	There is no distinct Presentation or Session layer in TCP/IP.
Transport Layer is Connection Oriented.	Transport Layer is both Connection-Oriented and Connectionless.
Network Layer is both Connection-Oriented and Connectionless.	Network Layer is Connectionless.
The OSI model is a foundation upon which networks are built. It is commonly used as a guiding tool.	In certain ways, the TCP/IP model is an implementation of the OSI model.
The OSI model's network layer supports both connection-oriented and connectionless services.	In the TCP/IP paradigm, the Network layer provides connectionless service.
The OSI model has a challenge in fitting protocols into it.	Any protocol does not suit the TCP/IP model.
The OSI model hides protocols, which can be easily altered as technology evolves.	It is difficult to replace a protocol in TCP/IP.
The OSI model explicitly specifies services, interfaces, and protocols, as well as the differences between them. It is protocol agnostic.	Services, interfaces, and protocols are not explicitly separated in TCP/IP. It's also protocol-specific.
It has seven layers.	It has four layers.

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Advantages of OSI Network Model

The following are the primary advantages of utilizing the OSI model:

It aids in the standardization of routers, switches, motherboards, and other pieces of gear.
Interfaces are simplified and standardized.
It makes modular engineering easier.
Assists you in ensuring that your technology is interoperable.
Assists you in speeding up the evolution
When technology advances, old protocols might be replaced by new protocols.
Provide support for both connection-oriented and connection-less services.
It's a common computer networking model.
Connectionless and connection-oriented services are both supported.
It has the ability to adapt to a wide range of procedures.

Advantages of TCP/IP Network Model

The following are the advantages of utilizing the TCP/IP model:

It assists you in establishing/establishing a connection between various sorts of computers.
It is not dependent on the OS(operating system) to function.
This model supports a wide range of routing protocols.
It facilitates organization-to-organization internetworking.
The client-server architecture of the TCP/IP protocol is extremely scalable.
It is self-contained and self-contained.
Several routing protocols are supported.
This model is capable of establishing a link between two computers.

Disadvantages of OSI Network Model

The following are some disadvantages of utilizing the OSI Model:

Fitting protocols is a time-consuming process.

It can only be used as a model for comparison.
It doesn't specify any particular protocol.
Some services are repeated in many tiers of the OSI network layer model, such as the transport and data link layers.
Because each layer must wait for data from the preceding layer, layers cannot work in parallel.

Disadvantages of TCP/IP Network Model

The following are some disadvantages of adopting the TCP/IP model:

TCP/IP is a difficult model to configure and manage.
TCP/IP has a higher shallow/overhead than IPX (Internetwork Packet Exchange).
The transport layer in this architecture does not ensure packet delivery.
It is hard to replace a protocol in TCP/IP.
Its services, interfaces, and protocols are not clearly separated.

You can also read about the network models in computer network and Basic Networking Commands and Subnetting in Computer Networks

Frequently Asked Questions

What is networking?

The communication between systems is handled via computer networks. Simultaneously, it examines how the information supplied from the source should reach its destination in the most efficient manner possible.

What is the objective of networking?

What are the different network models?

There are two main network models to choose from. Let us take a look at them.
Model of Open Systems Interconnection (OSI)
(Transmission Control Protocol/Internet Protocol) TCP/IP Model

What is the OSI model?

The OSI network model is a conceptual model which describes network communication for systems that are open to interconnection and communication.

What is TCP/IP network model?

TCP/IP allows us to specify how a particular computer should connect to the Internet and how data should be transmitted between them. When many computer networks are linked together, it aids in the creation of a virtual network.

Conclusion

In this article, we learned about the objectives of networking. We saw what are the different network models available in Computer Networking. We learned the difference between the OSI and TCP/IP network models. We also discussed the advantages and disadvantages of these network models.

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