What is Web Server ?


webserver.png
A Web server is a software that provides access services to users via HTTP or HTTPS communication protocols over files contained on a website, users use certain applications in the form of web browsers in making requests. The results of requests for web pages are generally in the form of HTML documents.
The Web began in 1989, Tim Berners-Lee through CERN (European Organization for Nuclear Research) proposed a project aimed at facilitating the exchange of information among researchers using a hypertext system. As a result of the implementation of this project, in 1990 Berners-Lee wrote two computer programs:
  • The world's first web server, which came to be known as CERN httpd, which runs on the NeXTSTEP operating system.
  • A browser he named WorldWideWeb;
In 1994, Tim Berners-Lee decided to standardize the World Wide Web Consortium (W3C) organization to organize advanced developments on other related technologies (HTTP, HTML, etc.) through the standardization process.
The primary function of a web server is to transfer files at the request of a user through a predefined communication protocol. Because a web page can consist of text files, images, video, and other web server utilization functions also to transfer all aspects of filing in a related web page; Including text, images, videos, or etc.
Users, usually through a web browser application, request services for files or web pages contained on a web server, then the server as the service manager responds back by sending the required pages and supporting files, or denying the request if the requested page not available.
Now generally web server has been equipped with a script language translator engine that allows web servers to provide dynamic website services by utilizing additional libraries such as PHP, ASP. The current use of web servers is not limited to website publishing, in practice many web servers are also used in other hardware such as printers, routers, web cameras that provide http service access in a local network intended to provide management tools and facilitate review Over the hardware
There are several example of web server like below :
  • Apache Web Server – HTTP Web Server
  • Apache Tomcat
  • Microsoft windows Server 2003 Internet Information Services (IIS)
  • Lighttpd
  • Sun Java System Web Server
  • Xitami Web Server
  • Zeus Web Server
Broadly speaking, the existing system on the web system can be described as follows:
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOY6ZZDxaQYFTCsG5FE-vhYFIU1HGt3JR2Ae10cQSqLWgbWKY3g772FHZM4OjB-6LP7TYYYPYraonq6aU7ZysHXHKIbTcH7H6QO-IkI_-9IckdDBWc2Omf-4JOIo4KqGT9YYck0aezPHs/s1600/2.PNG
On the server side, there are several components as follows:
  • Web server, useful to provide services to web client.
  • Web application, is an additional program that exists on the web server that makes the web view can be dynamic. Some applications are used like perl, asp, jsp and php. In addition web application also serves as a liaison and data taker to the database client request. In the web application known term server side scripting and client side scripting. Server side scripting is the code that is located on the server run by the server, the example of the server side eg is php. While client side scripting is the program code placed on the client side run by the browser on the client. Examples are javascript, applet, jscript and vbscripts.
  • DB, is a database that is prepared as a place of data if needed.
On the client side there are the following applications:
  • Web client, is a browser must be able to translate what is sent from the server and displayed to the user usually in the form of GUI.
Question & Answer
Q : What is the function / usefulness of the web server?
A : The main function of the web server is to transfer or move files requested by the user through a predefined communication protocol. Because in a single web page usually consists of various types of files such as pictures, video, text, audio, files and so on, the use of web server also functions to transfer the entire aspect of the screening in the page, including text, images, video, audio , Files and so on.
Q : Mention the package needed to install and configure the web server?
A :Apache2, php5, phpmyadmin, Mysql-server, lynx, nmap

Comments

Post a Comment

Popular posts from this blog

Computer Graphics Project "Planet Orbit" Source Code with Glut OpenGL

Image
Hello there !!!  This time I will post a project in the past. It is about rotation and applied to make earth orbital with moon and sun. As reminder, for you who haven’t install glut you can download it in here and follow the instruction I uploaded too. You can download this orbital project in here too. The image above is the result of orbital project. Here is the source code for this project. #include <windows.h> #include <stdlib.h> #include <GL/glut.h> #include <math.h> void myinit() { glClearColor(0.0, 0.0, 0.0, 1.0); glColor3f(1.0, 0.0, 0.0); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-400.0, 400.0, -400.0, 400.0,-400.0,400.0); glMatrixMode(GL_MODELVIEW); glShadeModel(GL_FLAT); glEnable(GL_DEPTH_TEST); } float putaransatu, putarandua = 0; typedef struct{ float x,y; } point2D_t; void drawDot(int x,int y){ glBegin(GL_POINTS); glVertex2i(x,y); glEnd(); } /*void bintang(void) { static int tick=0; static...
Read more

Quantization of Image Data Implementation in C#

Image
Introduction  This time we will share how to create an application to change the threshold value from black-and-white to the average value of the gray degree of all points and add textBox so that the user can change the threshold value according to the user's wishes. Besides that we also will add textBox to input quantization value. So the user can change the quantization as desired. Application Screenshoot A black-and-white image is an image that contains only black or white. Black is valued 0 and white is valued 255. To make the picture in black and white, the original color will be gray degree and each pixel will be compared with its threshold value. Normally, the black-and-white degree image has a 128 threshold value, so if the color value is less than 128, then the color is changed to 0 (black), and which is greater than or equal to 128 will be converted to 255 (white). Consider the example image below. Figure 1. The original image is predominantly dark When vi...
Read more

Computer Graphics Project "MINION" Source Code with Glut OpenGL

Image
Hello !!! This time I post about computer graphics again. And yes, I will share a project which mainly used rotation and a little bit morphing. You can download this project here ( Download here to download glut and follow the instruction ) .The character used in this project is well known. Well here’s the depiction of this project. Minion !!! The eyes will rotate. And it’s smile will move up and down which give you a creepy smile hahaha.  So here’s the source code for this project : #include <stdio.h> #include <math.h> #include <GL/glut.h> #ifndef M_PI #define M_PI 3.141592653589793 #endif typedef struct { float x; float y; } point2D_t; typedef struct { float r; float g; float b; } color_t; ////////////// OpenGL drawShape Functions ver 1 ///////////////// void setColor(float red,float green,float blue) { glColor3f(red, green, blue); } void setColor(color_t col) { glColor3f(col.r, col.g, col.b); } void drawDot(float x,float y) { ...
Read more