The 7 Layers of the OSI Model Last updated: March 03‚ 2008 The OSI‚ or Open System Interconnection‚ model defines a networking framework for implementing protocols in seven layers. Control is passed from one layer to the next‚ starting at the application layer in one station and proceeding to the bottom layer‚ over the channel to the next station and back up the hierarchy. |Application |This layer supports application and end-user processes. Communication partners
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the OSI model and how it relates to a network. Your response should include answers to the following: • On which layers of the OSI model do WAN protocols operate? • What are some of these protocols? • On which OSI layers do switches and routers operate? • If routers reside at more than one layer‚ what is the difference between the OSI layers? Introduction: The OSI model was introduced in 1984. Although it was designed to be an abstract model‚ the OSI model remains
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MEMORANDUM TO: Network Group FROM: Student SUBJECT: Security and the OSI Model The Open Systems Interconnect (OSI) Model is the basis on which network communications function. Every network application more or less adheres to the standards of the OSI Model. Each layer of the OSI model represents a level of network functionality. For each layer‚ there are different types of security to protect the network at that layer. The physical layer is the actual medium in which the data travels
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History of the OSI Reference Model Looking at the origins of the OSI Reference Model takes us back to several issues that were discussed in the Networking Fundamentals chapter of this Guide; specifically‚ I am talking about standards and standards organizations. The idea behind the creation of networking standards is to define widely-accepted ways of setting up networks and connecting them together. The OSI Reference Model represented an early attempt to get all of the various hardware and software
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OSI Model This memorandum will attempt to explain the Open Systems Interconnection Model‚ known more simply as the OSI Model. The OSI Model has seven levels‚ and these levels will be discussed in detail. Particular mention will be made to which level TCP/IP functions with the OSI Model. The seven levels of the OSI Model are as follows: 7) Application: Provides different services to the applications. 6) Presentation: Converts the information. 5) Session: Handles problems which are not communication
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Friday‚ September 24‚ 2010 JANN VINCENT PAUL C. LAGMAY BSIT-1A Open System Interconnection (OSI) The Open System Interconnection Reference Model or OSI Reference Model or OSI Model is essentially a conceptual description for layered communications and computer network protocol design. It was created as part of the Open Systems Interconnection or OSI initiative. In its most fundamental form‚ it separates network architecture into seven distinct layers: the Application‚ Presentation‚ Session
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Table of contents: 1. Introduction 1.1 History of the Concept 2. The OSI Reference Model 2.1 OSI Layer 1: The Physical Layer 2.2 OSI Layer 2: The Data Link Layer 2.3 OSI Layer 3: The Network Layer 2.4 OSI Layer 4: The Transport Layer 2.5 OSI Layer 5: The Session Layer 2.6 OSI Layer 6: The Presentation Layer 2.7 OSI Layer 7: The Application Layer 3. Summary of the OSI reference model 4. Sources 1. Introduction Over the past forty years computer networks have dramatically
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Chapter 1. The TCP/IP and OSI Networking Models Page 1 of 22 Chapter 1. The TCP/IP and OSI Networking Models This chapter covers the following exam topics: Operation of IP Data Networks Recognize the purpose and functions of various network devices such as Routers‚ Switches‚ Bridges and Hubs. Select the components required to meet a given network specification. Describe the purpose and basic operation of the protocols in the OSI and TCP/IP models. Welcome to the first chapter in your
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the OSI Model? The OSI model is a reference model which most IT professionals and network applications. use to describe networks The OSI model was originally intended to describe a complete set of production network protocols‚ but the cost and complexity of the government processes involved in defining the OSI network made the project unviable. In the time that the OSI designers spent arguing over who would be responsible for what‚ TCP/IP conquered the world. The Seven Layers of the OSI Model
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Secretary Maria and the OSI Network Model Mr. Boss meets Maria on the 7th floor of the main building headquarters. He gives Maria a secret message that must get to the US Embassy across town. Maria proceeds to the 6th floor where the message is translated into an intermediary language‚ encrypted and miniaturized. Maria then takes the elevator to the 5th floor where she checks the message to be sure it is all there and puts some checkpoints in the message so her counterpart at the US Embassy
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