Logical and Physical Network Design Term Paper

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Logical Design and Physical Network Design

Logical Design logical design is a conceptual, abstract design. At this stage, the system analysts do not deal with the physical implementation details; they are only concerned with defining the types of information that the organization needs to access through the networks (Hoffer, George, and Valacich, 2002). The process of logical design involves arranging data into a series of logical relationships, which are referred as entities and attributes. An entity represents information about a place, object, events, and concepts. In relational databases, an entity often maps to a table. An attribute is a component of an entity and helps define the uniqueness of the entity. In relational databases, an attribute maps to a column. One output of the logical design is a set of entities and attributes corresponding to fact tables and dimension tables. Another output of mapping is operational data from the source into subject-oriented information in a target data warehouse schema.

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In this approach, the system analysts identify business subjects or fields of data, define relationships between business subjects, and name the attributes for each subject.

In other words, a logical design can be considered as a high level map of information systems on which an information system builder maps the physical design of the system. The logical models show what a system is or what a system can do. However, logical design does not specify how the system will be implemented (Whitten and Bentley, 2001). To a large extent, the logical models provide the conceptual understanding of the information systems.

Example

An example of logical design for networks will be the map of a network schema that identifies all the computing labs, computers, and network specification that will allow different business offices to access important….....

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