7/30/2019 Client Server Krm 01may2002

1/12

Client Server Architecture

A Basic Introduction

Kathleen R. Murray, Ph.D.

May 2002

7/30/2019 Client Server Krm 01may2002

2/12

May 2002 UNT Center for Digital Knowledge 2

Client Server Architecture

A network

architecture in which

each computer or

process on thenetwork is either a

clientor a server.

Source: http://webopedia.lycos.com

7/30/2019 Client Server Krm 01may2002

3/12

May 2002 UNT Center for Digital Knowledge 3

Components

Clients

Servers

Communication Networks

Client

Server

7/30/2019 Client Server Krm 01may2002

4/12

May 2002 UNT Center for Digital Knowledge 4

Applications that run on computers

Rely on servers for

Files Devices

Processing power

Example: E-mail clientAn application that enables you to send

and receive e-mail

Clients

Clients are Applications

7/30/2019 Client Server Krm 01may2002

5/12

May 2002 UNT Center for Digital Knowledge 5

Servers

Computers or processes that manage

network resources

Disk drives (file servers) Printers (print servers)

Network traffic (network servers)

Example: Database ServerA computer system that processes

database queries

Servers Manage

Resources

7/30/2019 Client Server Krm 01may2002

6/12

May 2002 UNT Center for Digital Knowledge 6

Communication Networks

Networks Connect

Clients and

Servers

7/30/2019 Client Server Krm 01may2002

7/12

May 2002 UNT Center for Digital Knowledge 7

ClientServer Computing

Process takes place

on the server and

on the client

Servers

Store and protect data

Process requests from clients

Clients Make requests

Format data on the desktop

Client-Server

Computing Optimizes

Computing Resources

7/30/2019 Client Server Krm 01may2002

8/12

May 2002 UNT Center for Digital Knowledge 8

Application Functions

Software application

functions are separated

into three distinct parts

Client: Presentation & Application Logic

Server:

Data Management

7/30/2019 Client Server Krm 01may2002

9/12

May 2002 UNT Center for Digital Knowledge 9

Application Components

Data Management

Application Logic

Presentation

3 Logical Tiers

1

2

3

Database Applications:

Most common use of client-server architectures

Thin

Client

FatClient

2 Client Types

7/30/2019 Client Server Krm 01may2002

10/12

May 2002 UNT Center for Digital Knowledge 10

Middleware

Software that connects two

otherwise separate applications

Example: Middleware product

linking a database system to aWeb server

Client: Requests Data via Web

Database Server:

Manages Data

Web Server:

Presents Dynamic Pages

Middleware Links

Applications

7/30/2019 Client Server Krm 01may2002

11/12

May 2002 UNT Center for Digital Knowledge 11

Types of Servers

Application Servers

Audio/Video Servers

Chat Servers

Fax Servers

FTP Servers

Groupware Servers

IRC Servers

List Servers

Mail Servers

News Servers

Proxy Servers

Telnet Servers

Web Servers

Z39.50 Servers

Source: http://webopedia.lycos.com

From A to Z

7/30/2019 Client Server Krm 01may2002

12/12

May 2002 UNT Center for Digital Knowledge 12

Learn more about

Z39.50 client - serverapplications by

viewing the tutorial!

Thanks!