Define Web Server, Web Browser, WWW, ISP

Q. Write notes on the following:
WWW, ISP, WEB PAGE, WEB SITE, WEB SERVER, WEB BROWSER

WWW

WWW stands for World Wide Web. It is also called web. It is the collection of all connected web documents stored on different web servers. These documents contain information in the form of text, pictures, audio and video clips. WWW has many advantages:
· finding a job
· searching information
· advertisement for business
· weather forecast
· entertainment
· education

Difference between Internet and World wide web:

The main difference between internet and World Wide web is that World Wide Web is only a service provided by internet. It provides access to web documents. While internet provides many other services also like FTP, TELNET and chatting etc.

ISP (Internet Service Provider) OR IAP (Internet Access Provider

ISP stands for internet service provider. It is a company that provides internet connections to users. For example WOL net, PAK net, CYBER net etc. are ISPs. To connect to internet, users have to get internet connection from an ISP. These days, internet scratch cards are also available. ISP will provide you a user name, password. It will also provide a telephone number to connect to internet.
There are many ISPs these days in every big city of the country. A good ISP has the following features:
· Low rate
· Fast browsing
· Fast downloading and uploading
· Good customer support

WEB PAGE

A document created by HTML and found on web is a web page. A web page contains information in the form of text, pictures, audio and video clips. These web pages are stored on special computers called WEB SERVERS.

WEB SITE

A collection of related and interlinked web pages is called a web site. A web site may have many pages. Each web page will provide different information. For example, a web site for a College can have a Home page, Faculty page, Courses page, Games page and contact page. Home page is the main page of any web site. We can see all other pages by links provided in home page. Each web site has a unique address. For example web address of Baha-ud-din Zakaria University is www.bzu.edu.pk.

WEB SERVER

Web documents are stored on special and powerful computers called WEB SERVERS. Web servers are permanently connected to internet. When we type address of a web site in a browser (internet explorer), then web server fulfills this request. They provide requested information in the form of web page.

WEB BROWSER

A browser is software that is used to view web pages on internet. Many web browsers are available. But Mozilla Firefox, Google Chrome and Internet explorer are the most popular. We type address of any web site in address bar of browser and press ENTER key. Then first page called HOME PAGE of web site is displayed in browser window.

Explain different types of storage devices

Topic: Explain different types of storage devices in Computer systems Storage Devices Storage devices are used to store data and instructions permanently. Storage devices are also called secondary storage devices / backing storage devices / external storage devices or auxiliary storage devices. Examples of storage devices include Hard Disk, CD and DVD etc. Why Secondary Storage Devices are Used? Secondary storage devices are used because: Primary memory(RAM) is volatile and temporary. When computer is switched off, all data in ram is erased. Storage devices can store large amounts of data and instructions permanently whereas Primary memory has less capacity of storing data. Types Of Storage Devices There are three main types of storage devices: Magnetic Tape Magnetic Disk Optical Disk Flash Memory storage devices 1. Magnetic Tape Magnetic tape is the oldest storage device. It is made of plastic coated with magnetic material. Data is stored on mag

Important Objective Type Questions 101-155

MMC stands for multimedia card. SD stands for secure digital card. System Bus is used to connect main components of a computer such as cpu and main memory. A Port is an interface or a point of attachments. POS stands for Point Of Sale terminal. ATM stands for Automated Teller Machine. PIN stands for Personal identification number. Kbps stands for kilobits per second. Mbps stands for megabits per second. A port that transmits one bit at a time is called Serial Port. A type of port that transmits many bits at a time is called Parallel Port. LPT stands for Line Printer. Examples of system software are Operating System, Utility Programs and Device Drivers. Examples of operating systems are DOS, Windows, Unix and Linux. Examples of Utility programs are File Manager, Image Viewer, Disk Scanner and File Compressor. Software used to detect and remove viruses is called Antivirus . Examples of antivirus programs are Mcaffee, Avast,

Convert Centimeters to Inches Python Programming | Python Program Conver...

YouTube Video Tutorial How to write a Python program to convert centimetres to inches Formula to convert centimetres to inches Explanation of this Python Program This Python program prompts the user to enter a height in inches, converts it to centimeters, and then prints the converted value. It uses the conversion factor of 2.54 to perform the conversion and rounds the result to two decimal places before displaying it to the user. Here's an explanation of the provided Python program line by line: python inches = float ( input ( 'Enter the Height in inches to convert into centimeters:' )) This line prompts the user to enter a height in inches and assigns the entered value to the variable inches . The input() function is used to receive input from the user, and float() is used to convert the input into a floating-point number. python centimeters = inches * 2.54 This line calculates the equivalent value in centimeters by multiplying the inches variable by the conver

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