what is the difference between a physical and logical diagram?
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A logical DFD focuses on the business and business activities, while a physical DFD looks at how a system is implemented. ... It provides a solid basis for the physical DFD, which depicts how the data system will work, such as the hardware, software, paper files and people involved.
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A Venn diagram (also called primary diagram, set diagram or logic diagram) is a diagram that shows all possible logical relations between a finite collection of different sets. ... A Venn diagram consists of multiple overlapping closed curves, usually circles, each representing a set.
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A physical topology describes how network devices are physically connected - in other words, how devices are actually plugged into each other. ... A logical topology describes how network devices appear to be connected to each other.
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Material logic is concerned with the content of argumentation. It deals with the truth of the terms and the propositions in an argument. Formal logic is interested in the form or structure of reasoning. ... Formal logic is concerned with the method of deriving one truth from another.
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The Difference between Logical and Physical Hard Drives As the name suggests, a physical hard drive is the drive itself. It's hardware that exists physically and can be further classified into logical disks. ... The logical hard drive refers to the virtual space that is allocated within the drive.
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The difference between a data flow diagram (DFD) and a flow chart (FC) are that a data flow diagram typically describes the data flow within a system and the flow chart usually describes the detailed logic of a business process.
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Single-line diagrams show the overall conceptual layout of a circuit. They typically condense three-phase connections down to single lines for simplicity. ... Schematic diagrams show the network of contacts, a network that can be extremely complex, and the relays and motors that those contacts actuate.
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Difference Between Data Flow Diagram & Flow Chart. The difference between a data flow diagram (DFD) and a flow chart (FC) are that a data flow diagram typically describes the data flow within a system and the flow chart usually describes the detailed logic of a business process.
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The extents on a physical volume are called physical extents, while the extents of a logical volume are called logical extents. A logical volume is simply a mapping that LVM maintains between logical and physical extents.
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As nouns the difference between outline and diagram is that outline is a line marking the boundary of an object figure while diagram is a plan, drawing, sketch or outline to show how something works, or show the relationships between the parts of a whole.
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Physical view refers to the way data are physically stored and processed in a database. On the other side, logical view is designed to suit the need of different users by representing data in a meaningful format. Another word, the logical view tells the users, in their term, what is in the database.
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The basic difference between Logical and physical address is that Logical address is generated by CPU in perspective of a program whereas the physical address is a location that exists in the memory unit.
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Logical possibility is possibility in the broadest sense: whatever is conceivable, whatever can be imagined or thought, is logically possible, even if it isn't physically possible. Physical possibility is a restriction on logical possibility. Everything physically possible is logically possible but not vice versa.
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A conceptual data model identifies the highest-level relationships between the different entities. ... A logical data model describes the data in as much detail as possible, without regard to how they will be physical implemented in the database.
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Logical data model defines the structure of the data elements and set the relationships between them. A Physical Data Model describes the database specific implementation of the data model.
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A logical topology is how devices appear connected to the user. A physical topology is how they are actually interconnected with wires and cables. ... However, its physical topology is a star, in which every node on the network connects to a central hub.
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“Logic” and “logically” refer to a way of knowing things by applying formal rules. If A = B and B = C then logic tells us that A = C. “Logistics” and “logistically” refer to the details of how a thing is done.