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‚ Transport‚ Network‚ Data-Link‚ and Physical Layers. As a result it is frequently referred to as the OSI Seven Layer Model. A layer is
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the Circular Flow Model Economics is a multifaceted subject that takes years of study and research to fully grasp. Because it is also a very important subject to everyone‚ it is important that we all understand it. However‚ not all of us are economists or have the time to devote to such a study. This is where models come in. Economists take the key points‚ main concepts‚ and/or statistical data and simplify them for the rest of us. One such economic model is the Circular Flow Model. The movement of
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Short Answered Questions: 1. What is the purpose of having foreign key(s) in a relational database table? i. Represent a relationship between tables ii. Foreign key in one table has the same value‚ referencing another table’s primary key iii. Referential integrity 2. What is the purpose of having a primary key in the relational database table? i. Primary key is used as a unique identifier to represent the data in that row. ii. It is also used to provide
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Logical Data Models into Physical Data Models Susan Dash Ralph Reilly IT610-1404A-01 According to an article written by Tom Haughey the process for transforming a logical data model into a physical data model is: The business authorization to proceed is received. Business requirements are gathered and represented in a logical data model which will completely represent the business data requirements and will be non-redundant. The logical model is then transformed into a first cut physical model by applying
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financial profit- some stamps are very rare and can be sold for thousands of rupees. My hobby is model airplanes. I buy model airplane kits from stores and construct them on my own. It is a very satisfying hobby. I learn how to construct and put together model airplanes. It is not simple but a very complicated task. Each wing must be set at the correct angle‚ otherwise the airplane will not fly. The models are made of balsa wood which is a very light type of wood. It is also very
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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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some combo of biological‚ social‚ psychological influences. 8. Behavioral change typically consists of several attempts. Person may progress‚ backslide‚ and cycle and recycle through stages. THE STAGES OF CHANGE; TRANSTHEORETICAL MODEL OF CHANGE PRECONTEMPLATION (PC): People have no intention of changing (within next 6 mos). CONTEMPLATION (C): People engage in cognitive process. Decisional balance‚ which represents mental weighing of pros and cons assoc with changing behavior
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Size zero The image of a size zero models can have a negative impact on a large section of our society‚ by persuading women and men that this is the type of body they should respectively aim for and desire. On the other hand it can be argued that models should not be discriminated against‚ also that a ban on size zero would be difficult to implement due to the number of designers who prefer their clothes to be seen on this body type. This essay will discuss which choice we should be making. Size
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The main benefits of the OSI model include the following: • Helps users understand the big picture of networking • Helps users understand how hardware and software elements function together • Makes troubleshooting easier by separating networks into manageable pieces • Defines terms that networking professionals can use to compare basic functional relationships on different networks • Helps users understand new technologies as they are developed • Aids in interpreting vendor explanations of product
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Actually‚ you were asked to evaluate the expression r |x| s. The two relations (r and s) have join attribute B. The joined result is: A B 3 4 7 a b a 2. For the transaction database shown in a slide‚ how can we “flatten” it to make it a relational table (i.e.‚ in 1NF)? Show the resulting RDB table and identify its primary key. . Result (“flattened” table in 1NF‚ with primary key): TID Item 10 A 10 B 10 D 20 A 20 C 20 D 30 A 30 D 30 E 40 B 40 E 40 F 50
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