What is a physical data model？Why learn physical data model concepts？
题目
What is a physical data model？Why learn physical data model concepts？
相似考题
更多“What is a physical data model？Why learn physical data model concepts？”相关问题
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第1题：
You have set up an Internet based FTP server, where people can upload and download files. In terms of the OSI model, what is the highest layer used during the FTP sessions.
A. Application
B. Presentation
C. Session
D. Transport
E. Internet
F. Data Link
G. Physical
正确答案：A
A 解析：Explanation:
The application layer is the highest layer (layer 7) of the OSI model, and is reserved for end user applications. Since FTP is itself an application, layer 7 is the highest layer used.
Incorrect Answers:
B, C, D, E, F, G. In any given FTP session, all of these layers will be used at some point but they are incorrect because the question asked for the highest layer used by FTP.
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第2题：
The TCP/IP stack is a complete set of networking protocols. The OSI Model was meant
to be a standardized way of connecting devices together. and most protocols have some direct
correlation to the OSI Model. The OSI Model has 7 layers. the foruth layer is called(75)
A. physical layer
B. data link Iayer
C.application layer
D.transport layer
正确答案：D
TCP/IP协议栈是一种网络协议实现。OSI模型是用来进行设备间连接标准化的一种模型。OSI模型包含7层，第四层是传输层。 -
第3题：
The TCP／IP network model differs from the more popular OSI model. Which of the layers below belong to the TCP／IP model?()A. application layer
B. session layer
C. transport layer
D. internet layer
E. network layer
F. data link layer
G. physical layer
参考答案：A, C, D
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第4题：
Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin?（）
A. presentation
B. session
C. transport
D. network
E. physical
参考答案：D
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第5题：
The TCP/IP stack is a complete set of networking protocols.The OSI Model was meant to be a standardized way of connecting devices together,and most protocols have some direct correlation to the OSI Model.The OSI Model has 7 layers,the fourth layer is called______.A.physical layer
B.data link layer
C.application layer
D.transport layer答案：D解析： -
第6题：
Is relational DBMS physical data model suitable for spatial data？如果不适合，有哪两类解决途径？
正确答案: 不合适。关系DBMS则只能对数字进行简单处理；排序、查询树对数字非常有效，但这些概念都不适合用于处理空间数据
途径1：重新使用关系物理数据模型的概念：用空间填充曲线来定义点的排列有助于使用有序文件和查询树但可能会导致计算无效率
途径2：新空间技术：空间索引：例如网格，能提供更好的计算表现 -
第7题：
（）is not a physical wall, but a lot of virtual data to protect the computer network.
- A、Data wall
- B、Data Channel
- C、Data base
- D、firewall
正确答案:D -
第8题：
Which three of the following OSI model layers also belong to the TCP/IP model?（）
- A、The application layer
- B、The session layer
- C、The data link layer
- D、The transport layer
- E、The network interface layer
- F、The physical layer
正确答案:A,D,E -
第9题：
Which layer of the OSI reference model uses flow control, sequencing, and acknowledgements to ensure that reliable networking occurs?（）
- A、data link
- B、network
- C、transport
- D、presentation
- E、physical
正确答案:C -
第10题：
Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintaineD.To fix this issue, at which layer should the troubleshooting process begin?（）
- A、presentation
- B、session
- C、transport
- D、network
- E、physical
正确答案:D -
第11题：
问答题Is relational DBMS physical data model suitable for spatial data？如果不适合，有哪两类解决途径？正确答案： 不合适。关系DBMS则只能对数字进行简单处理；排序、查询树对数字非常有效，但这些概念都不适合用于处理空间数据
途径1：重新使用关系物理数据模型的概念：用空间填充曲线来定义点的排列有助于使用有序文件和查询树但可能会导致计算无效率
途径2：新空间技术：空间索引：例如网格，能提供更好的计算表现解析： 暂无解析 -
第12题：
问答题What is a physical data model？Why learn physical data model concepts？正确答案： 1）、执行逻辑数据模型的理论基础，使用现有的构件在一个有效容错的方式中
2）、选择合适的 DBMS ，某些 DBMS 不支持空间索引；使 DBMS 运行的更加有效率。解析： 暂无解析 -
第13题：
Which layer in the OSI model is responsible for translating frames into bits?()A. Application Layer
B. Presentation Layer
C. Data Link Layer
D. Physical Layer
参考答案：C
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第14题：
Which three of the following OSI model layers also belong to the TCP／IP model?()A. The application layer
B. The session layer
C. The data link layer
D. The transport layer
E. The network interface layer
F. The physical layer
参考答案：A, D, E
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第15题：
Which layer of the OSI reference model uses flow control, sequencing, and acknowledgements to ensure that reliable networking occurs?()A. data link
B. network
C. transport
D. presentation
E. physical
参考答案：C
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第16题：
cloud storage is a model of computer of computer data storage in which the digital data is stored in logical pools.The physical storage spans multiple servers（somentimes in multiple locations）,and the physical environment is typically owned and managed by a hosting company.As for the cloud concepet,the cloud storage service is one kind of（ ）.A.、laaS
B.PaaS
C.SaaS
D.DaaS答案：A解析： -
第17题：
An application architecture specifies the technologies to be used to implement one or more information systems. It serves as an outline for detailed design, construction, and implementation. Given the models and details, include （请作答此空）, we can distribute data and processes to create a general design of application architecture. The design will normally be constrained by architecture standards, project objectives, and （ ）. The first physical DFD to be drawn is the （ ）. The next step is to distribute data stores to different processors. Data（ ）are two types of distributed data which most RDBMSs support. There are many distribution options used in data distribution. In the case of （ ）, we should record each table as a data store on the physical DFD and connect each to the appropriate server.
A.logical DFDs and ERD
B.ideal object model and analysis class model
C.use case models and interface prototypes
D.physical DFDs and database schema
答案：A解析：应用架构说明了实现一个或多个信息系统所使用的技术，它作为详细设计、构造和实现的一个大纲。给定了包括逻辑数据流图和实体联系图在内的模型和详细资料，我们可以分配数据和过程以创建应用架构的一个概要设计。概要设计通常会受到架构标准、项目目标和所使用技术的可行性的制约。需要绘制的第一个物理数据流图是网络架构数据流图。接下来是分配数据存储到不同的处理器。数据分区和复制是大多数关系型数据库支持的两种分布式数据形式。有许多分配方法用于数据分布。在不同服务器上存储特定表的情况下，我们应该将每个表记为物理数据流图中的一个数据存储，并将其连接到相应的服务器。 -
第18题：
（）is not a physical wall but a flow virtual data to protect the computer network.
- A、data wall
- B、data channel
- C、database
- D、firewall
正确答案:D -
第19题：
You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operation?（）
- A、Application
- B、Presentation
- C、Session
- D、Transport
- E、Internet
- F、Data Link
- G、Physical
正确答案:A -
第20题：
The TCP/IP network model differs from the more popular OSI model. Which of the layers below belong to the TCP/IP model?（）
- A、application layer
- B、session layer
- C、transport layer
- D、internet layer
- E、network layer
- F、data link layer
- G、physical layer
正确答案:A,C,D -
第21题：
What are five of the seven layers that are found in the OSI model?（）
- A、application
- B、protocol
- C、session
- D、transport
- E、physical
- F、gateway
- G、data link
正确答案:A,C,D,E,G -
第22题：
Which layer in the OSI model is responsible for translating frames into bits?（）
- A、Application Layer
- B、Presentation Layer
- C、Data Link Layer
- D、Physical Layer
正确答案:C -
第23题：
多选题Which three of the following OSI model layers also belong to the TCP/IP model?（）AThe application layer
BThe session layer
CThe data link layer
DThe transport layer
EThe network interface layer
FThe physical layer
正确答案： A,D,E解析： 暂无解析