Structure of client server systems, Database Management System

Structure of Client Server Systems:In client/server architecture, clients show users who require services while servers give services. Both client and server are a combination of hardware & software. Servers are divided logical objects that communicate with clients over a network to do tasks together. A client makes a request for a service & receives a reply to that request. A server gets & processes a request, and sends back the needed response. The client/server systems may have two different types of architecture -

2-Tier and 3-Tier Client/Server Architectures

Each client/server application contains three functional units:

  • Presentation logic which gives the human/machine interaction (the user interface). The presentation layer operates input from the mouse, keyboard or other input devices and gives output in the form of screen displays. For instance, the ATM machine of a bank gives such interfaces.
  • Business logic is the functionality given to an application program. For instance, software that enables a customer to ask for to operate his/her balance on his/her account with the bank is business logic. It contains rules for withdrawal, for minimum balance etc. It is often known as business logic because it includes the business rules that drive a given enterprise.
  • The bottom layer gives the generalized services required by the other layers including file services, communications services, print services and database services. One example of such a service may be to give the records of customer accounts.

These functional units can reside on either the client or on one or more servers in the application:

                         599_Structure of Client Server Systems.png

 

                                                                     Figure: A client-server system

 

Posted Date: 3/13/2013 8:51:02 AM | Location : United States







Related Discussions:- Structure of client server systems, Assignment Help, Ask Question on Structure of client server systems, Get Answer, Expert's Help, Structure of client server systems Discussions

Write discussion on Structure of client server systems
Your posts are moderated
Related Questions
A student entity type has the following attributes,name..

State the meaning of Object Representation  The term object representation means "to represent object with the help of objects model symbols". Implementing objects is too simp

we need example of 2phase locking

Define Forms Based Interfaces? Forms-Based Interfaces - A forms-based interface display a form to each user. Forms are commonly designed and programmed for naive users and inte

Consider the relations described below: PHYSICIAN (regno, name, telno, city) PATIENT (pname, street, city) VISIT (pname, regno, date_of_visit, fee) Where the regno and pname ide

What is data integrity? Ans: It is the data consisted of in database that is accurate and consistent.  (Data integrity means that the data should be valid as per to the give

Explain Recursive relationship type? Recursive relationship type: A recursive relationship is one in that the similar entity participates more than once in the relationship

What is use of generating such tables? How can you create temporary tables? When you require a table only for a short time after that you want it to disappear automatically you

Consider the following six relation schemes and their corresponding sets of functional dependencies. In each case identify a. All the candidate keys b. The highest normal for

anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me