Explain about osi and its layers?

Question

Accepted Answer

The OSI model is a conceptual framework that standardizes the functions of a communication system into seven layers.

The OSI model stands for Open Systems Interconnection model.
It was developed by the International Organization for Standardization (ISO) in 1984.
The model is divided into seven layers, each responsible for specific functions.
The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Each layer interacts with the layer above and below it, providing services and passing data.
The Physical layer deals with the physical transmission of data.
The Data Link layer ensures error-free transmission over the physical layer.
The Network layer handles routing and logical addressing.
The Transport layer provides reliable end-to-end communication between hosts.
The Session layer establishes, manages, and terminates connections between applications.
The Presentation layer handles data formatting and encryption.
The Application layer provides services directly to the end-user applications.
The OSI model helps in understanding and troubleshooting network communication issues.

Accepted Answer

The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a telecommunication or networking system into seven distinct layers. Each layer serves a specific purpose and interacts with the layers above and below it. Here's a brief explanation of each OSI layer from the lowest to the highest:

Physical Layer: This layer deals with the physical transmission of data over the network medium. It defines characteristics such as cables, connectors, and signaling. It's responsible for the actual movement of raw bits between devices.
Data Link Layer: The data link layer provides error detection and correction and ensures reliable data transfer between directly connected nodes. It is divided into two sublayers: Logical Link Control (LLC) and Media Access Control (MAC).
Network Layer: This layer handles routing, addressing, and logical topology. It's responsible for finding the best path for data to travel from the source to the destination across the network. The Internet Protocol (IP) is a key protocol at this layer.
Transport Layer: The transport layer is responsible for end-to-end communication. It ensures data integrity, reliability, and flow control. Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) operate at this layer.
Session Layer: The session layer manages sessions or connections between applications. It establishes, maintains, and terminates connections, offering services like checkpointing and recovery.
Presentation Layer: This layer deals with data translation, encryption, and compression, making sure that data from the application layer is in a readable and understandable format.
Application Layer: The application layer is the topmost layer and interacts directly with end-user applications. It provides network services directly to user software, like web browsers, email clients, and file transfer programs.

The OSI model serves as a reference point for understanding how network protocols and communication technologies function. It helps in designing, troubleshooting, and discussing network architectures by providing a clear division of responsibilities at each layer. However, it's important to note that the OSI model is a theoretical concept, and in practice, networking protocols like the TCP/IP suite are more commonly used.

Accepted Answer

osi l (open systems interconnection) is a reference model for how applications communicate over a network. osi layers is 7 they are physical, data link, network, transport, session, presentation and application.

Accepted Answer

OSI consists of seven layers, and each layer performs a particular network function.

Accepted Answer

Osi layers is 7,there is 1.application layer human computer international layer, where application can acess the network services. 2.presentation layer-ensure that data is in a useful format and is where data encryption occurs. 3.session layer maintain connection and layers responsible for connecting ports and seccison. 4 transport layer transfi

Accepted Answer

Osi layers is 7 ,there is

1)Application layer-human computer interaction layer,where application can access the network service s

2) presentation layer-ensures that data is in a useful format and is where data encryption occurs

3) session layer-maintain connection and layers resposible for connecting ports and seccison

4) transport layer-transmit use data transmission proticals including TCP and udp

5) network layer-decides which physical path and data will take

6)Data link layer-deflines the format of data on the network

7)physical layer-transmit raw bit stream over thephysical medium

Accepted Answer

The Open Systems Interconnect (OSI) model is a conceptual framework that describes networking or telecommunications systems as seven layers, each with its own function.Thelayers help network pros visualize what is going on within their networks and can help network managers narrow down problems .

Thelayers are: Layer 1—Physical; Layer 2—Data Link; Layer 3—Network; Layer 4—Transport; Layer 5—Session; Layer 6—Presentation; Layer 7—Application.

Explain about osi and its layers?

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