Structure of client server systems, Database Management System

Assignment Help:

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

 


Related Discussions:- Structure of client server systems

Whta is the advantage of the database management approach, Whta is the adva...

Whta is the advantage of the database management approach? The advantage of the database management approach is data is integrated and can be accessed by multiple programs.

Explain transaction manager and their work, Explain Transaction manager and...

Explain Transaction manager and their work? Transaction Manager: Ensure the database remains in a constant (correct) state despite system failure, and in which concurrent trans

Database, why are older data models are being replaced by new data models

why are older data models are being replaced by new data models

Limitations of file based system, Limitations of File Based System The...

Limitations of File Based System The file-based system has some limitations. The limitations are listed as follows: Isolation and separation of data: When the data is

Dirty reads-problems of concurrent transactions, Dirty Reads: T10 reads a ...

Dirty Reads: T10 reads a value which is updated by T9. This update has not been committed and T9 aborts. T9 T10 Value of x old value = 200

Storage of database on hard disks, Storage Of Database On Hard Disks At...

Storage Of Database On Hard Disks At this point, it is worthwhile to note the difference among the terms file Organisation and the access method. A file organisation shows to t

Although how will the system recover, Although how will the system recover ...

Although how will the system recover The selection of REDO or UNDO for a transaction for the recovery is completed on the basis of the state of the transactions. This state is

RDBMS, why data in an RDMS need to be normalised

why data in an RDMS need to be normalised

State the design of associations, State the Design of Associations Bef...

State the Design of Associations Before designing associations, it is essential to know the way they are used. For this, analysis of association traversals is required. It is

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd