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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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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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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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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Security and the OSI Model Network security is a topic that reaches far beyond the realm of firewalls‚ passwords‚ and user ID accounts. For a network and data to remain secure there must be protective measures at each level in the OSI interconnect model. While each layer basically operates autonomously of the other it is important to ensure that the data being transmitted from the host to destination has not been tampered with or is being prevented from reaching its destination. There are
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• A2 Key Terms Copyright © 2009 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England and Wales (company number 3644723) and a registered charity (registered charity number 1073334). Registered address: AQA‚ Devas Street‚ Manchester M15 6EX. Dr Michael Cresswell‚ Director General. Teacher Resource Bank / GCE Communication and Culture / Other Guidance: A2 Key Terms / Version 1.0 A2 KEY TERMS
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Chapter 5: Jails Key Terms Today we call this role detention‚ the part of corrections that takes place before conviction and the imposition of sentence. The fee system endured for several hundred years. Today we have tuberculosis‚ hepatitis‚ and HIV; early English jails had gaol fever (typhus)‚ pneumonia‚ small pox‚ starvation and a host of other ailments related to malnourishment‚ no medical care‚ and infectious diseases that spread rapidly in close quarters. Linda Zupan called the medieval
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the character to the left of the insertion point‚ press the Bksp key. 4. To delete the character to the right of the insertion point‚ press the Delete key. 5. Pressing a combination of keys on the keyboard----such as Ctrl+Home to move to the top of the document----is referred to as a keyboard shortcut. 6. A potential contextual spelling error is indicated by a wavy red underline. 7. To select a sentence‚ hold down the Ctrl key‚ and then click anywhere in the sentence. 8. A small box that displays
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Checkpoint: OSI Model Paul Tegner IT/242 April 22‚ 2011 Mark Burke OSI Model The OSI Model consists of seven layers. These layers are the application layer‚ presentation layer‚ session layer‚ transport layer‚ network layer‚ data link layer‚ and physical layer. The Application Layer The application layer is responsible for interaction between the operating system and the network services and provides an interface to the system. It provides the user interface to a range
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KEY TERMS a-‚ an- = no‚ not (as in anemia}. AAA – abdominal aortic aneurysm. AAA – diagnostic arthroscopy‚ operative arthroscopy‚ and operative arthrotomy. A&P – anterior and posterior vaginal repair Ab‚ ab – abortion. ab- = away from. abate – to lessen or decrease. abdomen – the anterior portion of the body between the thorax and the pelvis. abdomin/o = abdomen (as in abdominocentesis). abdominal – pertaining to the abdomen. abdominal cavity – contains organs such as the stomach
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