请说明逻辑数据流图(LogicalData Flow Diagram)和物理数据流图(PhysicalData Flow Diagram)之间的主要差别。 相关知识点: 试题来源: 解析 逻辑数据流图说明应该具有哪些加工而不关心这些加工是如何实现的:物理数据流图则要说明加工是如何实现的。 逻辑数据流图说明应该具有哪些加工,而不关心这些加工是如何实现的:物理...
请用100字以内的文字简要说明逻辑数据流图(Logical Data Flow Diagram)和物理数据流图(Physical Data Flow Diagram)之间的主要差别。相关知识点: 试题来源: 解析 正确答案:这是一道要求读者掌握逻辑数据流图和物理数据流图区别点的简答题。本题所涉及的知识点如下。 ①数据流图是系统分析阶段用于描述系统逻辑模型的...
请说明逻辑数据流图(Logical Data Flow Diagram)和物理数据流图(Physical DataFlow Diagram)之间的主要区别。相关知识点: 试题来源: 解析 正确答案:物理数据流图关注的是系统中的物理实体,以及一些具体的文档、报告和其他输入/输出硬拷贝。物理数据流图用做系统构造和实现的技术性蓝图。逻辑数据流图强调参与者所做的...
A logical DFD focuses on the business and business activities, while a physical DFD looks at how a system is implemented. So while any data flow diagram maps out the flow of information for a process or system, the logical diagram provides the “what” and the physical provides the “how....
A physical data flow diagram shows how the system will be implemented, including the hardware, software, files, and people in the system. It is developed such that the processes described in the logical data flow diagrams are implemented correctly to achieve the goal of the business. Here is ...
There's also more than one way to describe the flow of information through a business. When you look at how information flows through a business, that is considered to be the logical flow. So a logical data flow diagram looks at business events and the data they require and produce. Lesso...
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试说明逻辑数据流图(logical data flow diagram)和物理数据流图(physical data flow diagram)之间的主要差别。查看答案更多“试说明逻辑数据流图(logical data flow diagram)和物理数据流图(physical data flow diagram)之”相关的问题 第1题 阅读下列说明,回答问题1和问题2,将解答写在答卷的对应栏内。【说明】 ...
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Computers and Network Isometric External Digital Devices Internet Symbols Logical Network Diagram Cable Network LAN Network Diagrams Logical Symbols Network Hardware LAN Physical Office Network Diagrams Example 2. Design Symbols — Computers and Network IsometricComputer...