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This document provides an introduction to the Open Systems Interconnection (OSI) model, which defines seven layers of network architecture: Physical, Data Link, Network, Transport, Session, Presentation, and Application. It describes each layer's responsibilities in moving data from one node or process to another. The Physical layer moves individual bits, the Data Link layer moves frames between nodes, the Network layer moves packets between hosts, the Transport layer moves segments between processes, and so on up to the Application layer which provides user-level services. An illustration is included showing how data is encapsulated and moves through each layer in an exchange between two systems.
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This document presents an academic description of the OSI reference model. It was created by a group of 5 students for their Data Communication course taught by Ms. Itisha Nowrin. The presentation will cover the 7 layers of the OSI model, including the physical, data link, network, transport, session, presentation, and application layers. It will also discuss what the OSI model is, how data flows through the layers, and provide a summary of the functions of each layer.
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The International Standards Organization created the Open Systems Interconnection model to allow diverse systems to communicate across networks. The seven-layer OSI model provides guidelines for developing universally compatible networking protocols, with each layer defining a segment of the process of moving information across a network. The physical layer coordinates transmission over a physical medium, while the data link layer delivers data units without errors. The network layer handles source-to-destination delivery across multiple links, and the transport layer provides process-to-process delivery of entire messages.
Osi model
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The Open Systems Interconnection model (OSI model) is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to their underlying internal structure and technology. Its goal is the interoperability of diverse communication systems with standard protocols. The model partitions a communication system into abstraction layers. The original version of the model defined seven layers.
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The document discusses the seven layers of the OSI model:
1. The physical layer is responsible for the actual physical connection between devices and contains information in bit form.
2. The data link layer is responsible for error-free node to node delivery of messages and transfers data over the physical layer.
3. The network layer works for transmission of data from one host to another located in different networks and selects the shortest path for packet routing.
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The document discusses the OSI model, which is a standard framework for network architecture. The OSI model divides network communication into 7 layers, with each layer building on the services of the layer below. The layers are physical, data link, network, transport, session, presentation, and application. Each layer has a specific role, with lower layers handling physical transmission and higher layers focusing on services for applications and users.
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The International Standards Organization created the Open Systems Interconnection model to allow diverse systems to communicate across networks. The seven-layer OSI model provides guidelines for developing universally compatible networking protocols, with each layer defining a segment of the process of moving information across a network. The physical layer coordinates transmission over a physical medium, while the data link layer delivers data units without errors. The network layer handles source-to-destination delivery across multiple links, and the transport layer provides process-to-process delivery of entire messages.
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The document discusses the seven layers of the OSI model:
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2. The data link layer is responsible for error-free node to node delivery of messages and transfers data over the physical layer.
3. The network layer works for transmission of data from one host to another located in different networks and selects the shortest path for packet routing.
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The document discusses the OSI model, which is a standard framework for network architecture. The OSI model divides network communication into 7 layers, with each layer building on the services of the layer below. The layers are physical, data link, network, transport, session, presentation, and application. Each layer has a specific role, with lower layers handling physical transmission and higher layers focusing on services for applications and users.
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This document provides an overview of the Open Systems Interconnection (OSI) model, which is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system without regard to their underlying internal structure and technology. It describes how data moves from one computer to another networked computer by dividing the tasks involved into 7 smaller layers, with each layer performing a specific communication task and providing services to adjacent layers to reduce complexity. The 7 layers are the physical, data link, network, transport, session, presentation, and application layers.
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The document is about the OSI model and TCP/IP model. It discusses:
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2) The TCP/IP model is a simplified version of the OSI model containing 4 layers - application, transport, network, and network interface layers.
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OSI (Open Systems Interconnection) is defined as reference model that is used for how applications can impart over the network. It is the conceptual model that is used for comprehension relationships. Copy the link given below and paste it in new browser window to get more information on OSI Model:- www.transtutors.com/homework-help/computer-science/osi-model.aspx
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The document discusses the OSI model, which is a standard framework for networking. It describes the seven layers of the OSI model from physical to application layer. Each layer has a specific function and provides services to the adjacent layer. The physical layer deals with physical connections and bit-level transmission. The data link layer handles frame delivery and error control. The network layer routes packets across networks. The transport layer ensures end-to-end delivery of messages. Higher layers include the session, presentation and application layers, which establish communication sessions, handle formatting and provide user services respectively.
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The document discusses the seven layers of the OSI reference model:
1. The physical layer is responsible for transmitting raw bits of data and defines physical specifications of interfaces and medium.
2. The data link layer handles framing and error checking at the local network segment.
3. The network layer handles logical addressing and routing between different networks.
4. The transport layer provides end-to-end communication and ensures reliable delivery of data.
5. The session layer establishes and manages communication sessions between applications.
6. The presentation layer handles translation, encryption and compression of data.
7. The application layer provides services to the end user such as file transfer, email and directory services.
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An Introduction to the OSI ModelSource: Flickr/jonjohnson
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The document provides information about the OSI model and TCP/IP model for data communication. It describes the seven layers of the OSI model and the functions of each layer. It also describes the four layers of the TCP/IP model and provides a brief comparison of the two models.
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The document is about the OSI model and TCP/IP model. It discusses:
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2) The TCP/IP model is a simplified version of the OSI model containing 4 layers - application, transport, network, and network interface layers.
3) It provides brief descriptions of the responsibilities of some of the OSI layers, including that the physical layer finds the NIC, the data link layer finds the mac address, and the network layer divides data into packets for transfer.
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The document discusses the seven-layer Open Systems Interconnection (OSI) model for data communication between networked systems. It describes each layer of the OSI model including: the physical layer which deals with transmission and signaling of raw bit streams over a communication channel; the data link layer which transforms the physical layer into a reliable link; the network layer which is responsible for logical addressing and routing of packets across multiple networks; the transport layer which ensures complete and error-free delivery of message segments; the session layer which establishes and synchronizes interactions between systems; the presentation layer which formats data for transmission; and the application layer which provides user interfaces and services. Each layer uses the services of lower layers and provides services to higher layers.
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The document summarizes the seven layers of the OSI model from top to bottom. It describes each layer's main responsibilities and concerns. The seven layers are: Application, Presentation, Session, Transport, Network, Data Link, and Physical. The Physical Layer is responsible for moving data in the form of electromagnetic signals across a transmission medium. The Data Link Layer is responsible for moving frames from one node to the next and handles framing, addressing, error control, and flow control. The Network Layer delivers packets from source to destination and handles routing and logical addressing.
Networking overview
An internetwork is a collection of individual networks connected by networking devices that functions as a single large network. The OSI reference model describes how information moves between networked computers in seven layers, with the physical layer dealing with physical connections and the application layer closest to end users. Protocols implement the functions of OSI layers to enable actual communication between systems.
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Data communication presentation
- 1. Welcome to Data Communication Presentation
- 2. Group Member Name ID Md. Nasir Uddin Mahamud 152-15-6226 Md. Touhidur Rahman 152-15-6232 Tusher Chandra Ghosh 152-15-6237 Md. Mithu Mia 152-15-6243 Md. Atiqul Islam 152-15-6244
- 3. Introduction Open Systems Interconnection Basic Reference Model (OSI Reference Model or OSI Model) is an abstract description for layered communications and computer network protocol design. It divides network architecture into seven layers which, are the Application, Presentation, Session, Transport, Network, Data-Link, and Physical Layers. It was first introduced in the late 1970s. The current standard was published in 1996. The OSI model depicts how data communications should take place.
- 4. OSI Model's 7 Layers 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical
- 5. Division of Layers Upper Layers Lower Layers Middle Layer 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical
- 6. Physical Layer The physical layer is responsible for movements of individual bits from one hop (node) to the next. 10101000000010111110 From data link layer 10101000000010111110 To data link layer Physical layer Physical layer Transmission medium
- 7. Data Link Layer (Host to Host) The data link layer is responsible for moving frames from one hop (node) to the next. DataH2 T2 From network layer DataH2 T2 To network layer To physical layer From physical layer Data link layer Data link layer
- 8. Network Layer (Source to Destination) The network layer is responsible for the delivery of individual packets from the source host to the destination host. DataH3 Packet From transport layer To data link layer DataH3 Packet To transport layer From data link layer Network layer Network layer
- 9. Transport Layer (Process to Process) The transport layer is responsible for the delivery of a message from one process to another. Segments DataH4 From session layer To network layer Transport layer DataH4 DataH4 Segments DataH4 From session layer From network layer Transport layerDataH4 DataH4
- 10. Session Layer (Dialog initiation) The session layer is responsible for dialog control and synchronization. DataH5 From Presentation layer To transport layer Data Data Syn Syn Syn DataH5 To Presentation layer From transport layer Data Data Syn Syn Syn Session layer Session layer
- 11. Presentation Layer (dependency) The presentation layer is responsible for translation, compression and encryption DataH6 From application layer To session layer DataH6 To application layer From session layer presentation layer presentation layer
- 12. Application Layer (user level service) DataH7 USER (Human or Program) To presentation layer DataH7 Application layer Application layer Message Message The application layer is responsible for providing services to the user. X.500 FTAM X.400 X.500 FTAM X.400 From presentation layer USER (Human or Program)
- 13. An exchange using OSI model
- 14. An exchange using OSI model