Unlike our five layer model the osi network model – Unlike our five-layer model, the OSI network model offers a more comprehensive and structured approach to network communication, enabling efficient data transmission and reliable network operations.

The OSI model, developed by the International Organization for Standardization (ISO), comprises seven layers, each with specific functions and responsibilities. This layered architecture provides a clear understanding of how data is encapsulated, addressed, routed, and controlled within a network, ensuring interoperability and compatibility among different network devices and protocols.

Layer Structure

The OSI model has seven layers, while the five-layer model has five layers. The OSI model’s layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application. The five-layer model’s layers are: Physical, Data Link, Network, Transport, and Application.The Physical layer is responsible for the physical connection between devices.

The Data Link layer is responsible for error detection and correction on the physical link. The Network layer is responsible for routing packets through the network. The Transport layer is responsible for ensuring that data is delivered reliably and in order.

The Session layer is responsible for managing sessions between applications. The Presentation layer is responsible for translating data between different formats. The Application layer is responsible for providing services to applications.The key differences in the layer structure of the two models are:* The OSI model has a Session layer, while the five-layer model does not.

• The OSI model has a Presentation layer, while the five-layer model does not.
• The five-layer model combines the Session and Presentation layers into the Application layer.

Data Encapsulation: Unlike Our Five Layer Model The Osi Network Model

In the OSI model, data is encapsulated in a series of headers and trailers. Each header contains information about the layer that is sending the data, the layer that is receiving the data, and the type of data that is being sent.

Each trailer contains information about the length of the data and a checksum.In the five-layer model, data is encapsulated in a single header. The header contains information about the layer that is sending the data, the layer that is receiving the data, the type of data that is being sent, and the length of the data.The

encapsulation process in the OSI model is more complex than the encapsulation process in the five-layer model. This is because the OSI model has more layers, and each layer adds its own header and trailer to the data.

Addressing and Routing

In the OSI model, each device on the network is assigned a unique IP address. Packets are routed through the network based on the destination IP address.In the five-layer model, each device on the network is assigned a unique MAC address.

Packets are routed through the network based on the destination MAC address.The addressing and routing mechanisms in the OSI model are more complex than the addressing and routing mechanisms in the five-layer model. This is because the OSI model has more layers, and each layer adds its own addressing and routing information to the packet.

Error Control and Flow Control

The OSI model uses a variety of error control mechanisms to ensure that data is delivered reliably. These mechanisms include error detection, error correction, and retransmission.The five-layer model uses a simpler error control mechanism called checksumming. Checksumming is a method of error detection that involves adding a checksum to the end of each packet.

The checksum is a value that is calculated based on the contents of the packet. If the checksum is incorrect, the packet is discarded.The OSI model’s error control mechanisms are more complex than the five-layer model’s error control mechanisms. This is because the OSI model has more layers, and each layer adds its own error control mechanisms to the data.The

OSI model uses a variety of flow control mechanisms to ensure that data is not sent faster than it can be received. These mechanisms include windowing and flow control bits.The five-layer model uses a simpler flow control mechanism called stop-and-wait.

Stop-and-wait is a method of flow control that involves sending a packet and then waiting for an acknowledgment from the receiver before sending the next packet.The OSI model’s flow control mechanisms are more complex than the five-layer model’s flow control mechanisms.

This is because the OSI model has more layers, and each layer adds its own flow control mechanisms to the data.

Protocol Stack

The OSI model and the five-layer model use different protocol stacks. The OSI model’s protocol stack is a seven-layer stack, while the five-layer model’s protocol stack is a five-layer stack.The following table compares the protocol stacks used in the OSI model and the five-layer model:| Layer | OSI Model | Five-Layer Model ||—|—|—|| 7 | Application | Application || 6 | Presentation | N/A || 5 | Session | N/A || 4 | Transport | Transport || 3 | Network | Network || 2 | Data Link | Data Link || 1 | Physical | Physical |The key differences in the protocol stacks of the two models are:* The OSI model has a Presentation layer, while the five-layer model does not.

• The OSI model has a Session layer, while the five-layer model does not.
• The five-layer model combines the Session and Presentation layers into the Application layer.
  

  Quick FAQs

  What are the key differences between the OSI and five-layer models?

The OSI model has seven layers while the five-layer model has five. The OSI model is more detailed and provides a more comprehensive view of network communication.

Which model is more commonly used in practice?

The five-layer model is more commonly used in practice due to its simplicity and ease of understanding.

What are the advantages of using the OSI model?

The OSI model provides a more comprehensive and structured approach to network communication, enabling efficient data transmission and reliable network operations.