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    Web Server

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    Nipun Verma
    This document provides an overview of web servers, including IIS and Apache. It describes how web servers respond to client requests by providing resources using HTTP. It explains the different types of HTTP requests, the typical multi-tier system architecture with client, middle, and data tiers, and the differences between client-side and server-side scripting. It also discusses how to access web servers locally or remotely and lists some additional web resources.

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    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd

    Web Server

    Uploaded by

    Nipun Verma
    276 views11 pages
    This document provides an overview of web servers, including IIS and Apache. It describes how web servers respond to client requests by providing resources using HTTP. It explains the different types of HTTP requests, the typical multi-tier system architecture with client, middle, and data tiers, and the differences between client-side and server-side scripting. It also discusses how to access web servers locally or remotely and lists some additional web resources.

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    WebServer.ppt

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    This document provides an overview of web servers, including IIS and Apache. It describes how web servers respond to client requests by providing resources using HTTP. It explains the different types of HTTP requests, the typical multi-tier system architecture with client, middle, and data tiers, and the differences between client-side and server-side scripting. It also discusses how to access web servers locally or remotely and lists some additional web resources.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    276 views11 pages

    Web Server

    Uploaded by

    Nipun Verma
    This document provides an overview of web servers, including IIS and Apache. It describes how web servers respond to client requests by providing resources using HTTP. It explains the different types of HTTP requests, the typical multi-tier system architecture with client, middle, and data tiers, and the differences between client-side and server-side scripting. It also discusses how to access web servers locally or remotely and lists some additional web resources.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    of 11

    Web Servers (IIS and Apache)

    Outline
    Introduction
    HTTP Request Types
    System Architecture
    Client-Side Scripting versus Server-Side Scripting
    Accessing Web Servers
    Web Resources

    1
    Objectives
    ● In this lesson, you will learn:
    ● To understand a Web server’s functionality.
    ● To introduce Microsoft Internet Information Services
    (IIS) and Apache Web server.
    ● To learn how to request documents from a Web
    server.

    2
    9.1 Introduction

    ● Web server: Responds to client requests by providing


    resources

    ● URI (Uniform Resource Identifier)

    ● Web server and client communicate with platform-


    independent Hypertext Transfer Protocol (HTTP)

    3
    Web servers discussed in this chapter.
    4
    9.2 HTTP Request Types

    ● get :
    ● Get (retrieves) information from a server
    ● i.e: retrieve HTML document or image, fetch
    search results
    ● Sends information as part of URL
    ● www.search-engine.com/search?name=value

    ● post:
    ● Post (sends) data to a server
    ● i.e: authentication information, form data.
    ● Sends form data as an HTTP message, not as
    part of URL
    5
    ● Browsers often cache (save on disk) Web pages
    ● Quickly reload the page (speed up browsing experience)
    ● Browser asks the server if the document has changed or
    expired
    ● If not, the browser loads the document from the cache

    6
    9.3 System Architecture

    ● Multi-tier application (n-tier application):


    ● Information tier (data or bottom tier)
    ● Maintains data for the application
    ● Stores data in a relational database management system
    (RDBMS)
    ● Middle tier
    ● Implements business logic and presentation logic
    ● Control interactions between application clients and application
    data
    ● Client tier (top tier)
    ● Application’s user interface
    ● Users interact directly with the application through the client tier

    7
    Information tier (data or
    Client tier (top tier) Middle tier
    bottom tier)

    8
    9.4 Client-Side Scripting versus Server-Side
    Scripting

    ● Client-side scripts
    ● Validate user input
    ● Reduce requests needed to be passed to server
    ● Access browser
    ● JavaScipt, VBScript

    ● Server-side scripts
    ● Executed on server
    ● Generate custom response for clients
    ● Wide range of programmatic capabilities
    ● Access to server-side software that extends server
    functionality 9
    9.5 Accessing Web Servers

    ● Request documents from Web servers


    ● know the Host names
    ● Local Web servers
    ● Access through machine name or localhost
    ● Remote Web servers
    ● Access through machine name
    ● Domain name or Internet Protocol (IP) address
    ● Domain name server (DNS): Computer that maintains a
    database of host names and their corresponding IP address

    10
    9.6 Web Resources
    ● www.microsoft.com/msdownload/ntoptionpack/askwiz.asp
    ● www.w3.org/Protocols
    ● www.apache.org
    ● httpd.apache.org
    ● httpd.apache.org/docs-2.0
    ● www.apacheweek.com
    ● linuxtoday.com/stories/18780.html
    ● www.iisanswers.com
    ● www.iisadministrator.com

    11

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