Explain each layer of TCP/IP model in detail. Compare it with OSI model.

This answer is restricted. Please login to view the answer of this question.

Login Now

TCP/IP stands for Transmission Control Protocol/ Internet Protocol. TCP/IP Stack is specifically designed as a model to offer a highly reliable and end-to-end byte stream over unreliable internetwork.

In this TCP/IP, There are five layers of protocols

  1. Physical Layer
  2. Data Link Layer
  3. Network Layer
  4. Transport Layer
  5. Application Layer

1. Physical Layer:

The physical layer in the internet model, as in the physical connection between the sender and receiver. Its role is to transfer a series of electrical, radio, or light signals through the circuit. The physical layer includes all the hardware devices (e.g. computers, modems, and hubs) and physical media (e.g. cables and satellites)

2. Data Layer Link:

The data layer link is responsible for moving a message from one computer to the next computer in the network path from the sender to the receiver. The data link layer in the Internet model platforms the same three functions as the data link layer in the OSI mode.

  • First, it controls the physical layer by deciding when to transmit messages over the media.
  • Second, It formats the messages by indicating where they start and end.
  • Third, It decides and corrects any errors that have occurred during transmission.

3. Network Layer:

The network layer in the internet model performs the same functions as the network layer in the OSI model.

  • First, It performs routing, in that it selects the next computer to which the message should be sent.
  • Second, It can find all addresses of that computer if it doesn’t already know it.

4. Transport Layer:

The transport layer in the internet model is very similar to the transport layer in the OSI model. It performs two functions.

  • First, It is responsible for linking the application layer software to the network and establishing end-to-end connections between the sender and receiver when such connections are needed.
  • Second, It is responsible for breaking long messages into several smaller messages to make them easier to transmit.

The transport layer can also detect lost messages and request they be resent.

5. Application Layer:

The application layer is the application software used by the network user and includes much of what the OSI model contains in the application, presentation, and session layers. It is the user’s access to the network. By using the application layer, the user defines what messages are sent over the network.

Comparison Between OSI and TCP/IP Model:

The comparison between OSI and TCP/IP Reference Model is

The full form of TCP/IP is Transmission Control Protocol/ Internet Protocol The full form of OSI is Open Systems Interconnection
It is a communication protocol that is based on standard protocols and allows the connection of hosts over a network It is a structured model which deals which the functioning of a network
In 1982, the TCP/IP model became the standard language of ARPANET In 1984, the OSI model was introduced by the International Organisation of Standardization (ISO)
It comprises four layers:

  • Network Interface
  • Internet
  • Transport
  • Application
It comprises seven layers:

  • Physical
  • Data Link
  • Network
  • Transport
  • Session
  • Presentation
  • Application
It follows a horizontal approach It follows a vertical approach
The TCP/IP is the implementation of the OSI Model An OSI Model is a reference model, based on which a network is created
It is protocol dependent It is protocol independent
If you found any type of error on the answer then please mention on the comment or report an answer or submit your new answer.
Leave your Answer:

Click here to submit your answer.

  Loading . . .