Xem 1-16 trên 16 kết quả Client tier
  • Công nghệ client-server • • Client/server là mô hình mạng trong đó máy chủ xử lý các yêu cầu từ máy khách. Thiết kế multi-tier: Một ứng dụng có 3 nhiệm vụ nhập dữ liệu, ghi nhớ dữ liệu, xử lý dữ liệu. Do đó người ta chia ra làm 3 tier (hoặc nhiều tier) Client Tier Giao diện người dùng hay lớp trình diễn Middle Tier Các thành phần mô phỏng logic của tổ chức (ASP) Third Tier Hệ thống quản trị Cơ sở dữ liệu (DBMS) ...

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  • Good programming is difficult. It is especially arduous for new programmers given the pace of change and the ever-expanding size of the software engineering body of knowledge (www.swebok.org) that they must master. The authors of this book have found that experience and in-depth understanding are key factors in both programmer productivity and reliable software. The bottom line is that experienced programmers don’t stumble around in the dark. They know the lay of the land, they recognize patterns, and they avoid the hazardous areas.

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  • This module explains how the Microsoft® .NET Framework can be used to help in building the presentation tier of an e-business Web site. Specifically, this module focuses on the challenges facing presentation tier development, and it then introduces new features of ASP.NET that can be used to ease the development process and improve the client experience.

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  • Some consider their job to be to simply listen to what others have to say and then bring that information back to their client. Sleuthing for a company is an increasingly popular career choice. The SCIP says that its membership has more than doubled in the last six years. 14 And U.S. companies spend a total of $1 billion a year on competitive intelligence programs. 15 This is in contrast to the $45 billion that Fortune 100 companies lost to thefts of proprietary information in 1999. This amount continues to increase.

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  • Chapter 17 - Client-server processing, parallel database processing, and distributed databases. After this chapter, you should able to: List reasons for client-server processing, parallel database processing, and distributed data; describe two-tier, three-tier, and multiple-tier client-server database architectures; describe common architectures for parallel database processing;...

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  • Architect của application software hiện giờ có nói chung ba tầng (three tiers): tầng giao diện (Presentation Tier), tầng giữa (Middle Tier) và tầng dữ kiện (Data Tier): Presentation Tier: Trong desktop Client ta dùng VB6 và nối với middle tier qua DCOM. Trong browser based Client ta dùng Javascript hay Java applet. Từ browser based Client ta dùng http để nối với middle tier qua IIS/ASP (có thể dùng COM ở đây). Middle Tier: Chứa các rules để validate data trên client và các business rules khác.

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  • Ultra-Fast ASP.NET 4.5 presents a practical approach to building fast and scalable web sites using ASP.NET and SQL Server. In addition to a wealth of tips, tricks and secrets, you’ll find advice and code examples for all tiers of your application, including the client, caching, IIS 7.5, ASP.NET 4.5, threads, session state, SQL Server 2012 (otherwise known as Denali), Analysis Services, infrastructure and operations.

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  • The Web Application Developer’s Guide presents some of the technologies available for developing web-based multi-tier applications. A web application is a collection of HTML/XML documents, web components servlets and JavaServer Pages), and other resources in either a directory structure or archived format known as a web archive (WAR) file. A web application is located on a central server and provides service to a variety of clients.

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  • Oracle9i cho phép một server nằm ở lớp giữa (middle-tier) xác nhận hộ một client. Ta có thể thực hiện việc này bằng cách đưa vào mệnh đề GRANT CONNECT THROUGH trong câu lệnh ALTER USER.

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  • Hình2.3:sơ đồ tầng Web tier Business tier: Business tier là một lớp logic dùng để thực hiện việc xử lý của hệ thống J2EE server. Hình2.4: sơ đồ tầng Business tier. Hình vẽ minh họa cho ta thấy 1 Enterprise Bean có thể nhận dữ liệu từ client, xử lý nó (nếu cần thiết) và gửi nó đến EIS tier (Enterprise Information System tier) để lưu trữ.

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  • Which of the following systems offers the best results in introducing a three-tier client-server architecture? a) A system with a small number of application services and classes b) A system where correction and addition of applications are frequent

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  • Databases are encapsulated by business logic. Before the advent of stored-procedures, all the business logic ran in the transaction processing monitor which was the middle tier of the classic three- tier presentation-application-data architecture. With stored pro- cedures, the TP-monitors were disintermediated by two-tiered client/server architectures. The emergence of web-servers and HTTP brought three-tier architectures back to center stage – in part ...

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  • Designers still have the option of three-tier or n-tier application designs; but, they now have the two-tier option again. The sim- plicity of two-tier client/server is attractive, but security issues (databases have huge attack surfaces) may cause many designers to want three-tier server architectures with the web server in the demilitarized zone (DMZ). It is likely that web services will be the way we federate heteroge- neous database systems. ...

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  • In n-tier architecture, the clients and servers can be placed at distant locations. The server that implements business logic can provide services to various clients. In such a scenario, it is essential to ensure asynchronous communication.

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  • Two-Tier Networks In a two-tier network, a client communicates directly with a server. This is also known as a client-server architecture. A client-server network is an architecture that involves client processes that request services from server processes. The client and server communicate over a network using a given protocol, which must be installed on both the client and the server. A common error in client-server network development is to prototype an application in a small, two-tier environment and then scale up by adding more users to the server.

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  • The “business logic” of traditional three-tier system terminology is part of our definition of front-end, because these services integrate their service logic with the code that receives and replies to client requests. The front-end tier is responsible primarily for locating data on back-end machine(s) and routing it to and from clients in Content and ReadMostly, and for providing online services such as email, newsgroups, and a web proxy in Online.

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