13. Internet & Web Technologies Internet Basics, World Wide Web, Web Browsers, Search Engines, Email and Cloud Services
Internet and web technologies are fundamental parts of modern computing. They allow people to communicate, access information, share data, and use online services from anywhere in the world.
Today, education, business, banking, entertainment, and social communication all depend heavily on internet-based technologies.
The Internet is a global network of interconnected computer networks that communicate with each other using standardized communication protocols.
It allows millions of computers and devices worldwide to exchange data and share information.
The Internet does not belong to a single organization or government. Instead, it is a worldwide system made up of many independent networks connected together.
Global Connectivity
The Internet connects computers across countries and continents.
Information Sharing
Users can share text, images, videos, software, and documents.
Communication
People can communicate using email, messaging, and video calls.
Access to Online Services
Users can access services such as online banking, e-learning, social media, and cloud storage.
To connect to the Internet, a user generally needs:
An Internet Service Provider (ISP) is a company that provides internet access to users.
Examples include:
The World Wide Web (WWW) is a system of interlinked web pages and multimedia content that can be accessed through the Internet.
It is one of the most widely used services on the Internet.
The web was invented by Tim Berners-Lee in 1989 to help researchers share information easily.
Web pages are created using languages such as:
These web pages are stored on web servers and accessed by users through web browsers.
Web Pages
A web page is a digital document displayed in a browser.
Websites
A collection of related web pages stored under a single domain name.
Example:
www.example.com
URL (Uniform Resource Locator)
A URL is the address used to access a specific web page on the Internet.
Example:
https://www.example.com/about
HTTP/HTTPS
These are communication protocols used to transfer web pages between servers and browsers.
A web browser is a software application used to access and display web pages from the Internet.
Browsers interpret HTML, CSS, and JavaScript code to display websites in a user-friendly format.
Commonly used web browsers include:
Browsers communicate with web servers to request web pages and display them on the user's device.
A search engine is a software system designed to help users find information on the Internet.
Search engines index billions of web pages and allow users to search for information using keywords.
When a user enters a search query, the search engine analyzes its database and returns the most relevant results.
Popular search engines include:
Example search query:
best schools in Karachi
The search engine will display related websites and information.
Search engines use complex algorithms to determine which results are most useful to users.
The Internet provides many communication and storage services, including email and cloud computing.
Email is a system used to send and receive digital messages over the Internet.
It allows users to communicate quickly and send documents, images, and other files.
An email address generally has two parts:
username@domain.com
Example:
student@gmail.com
Common email services include:
Cloud computing refers to storing data and running applications on remote servers accessed through the Internet instead of on a local computer.
Cloud services allow users to access their files and applications from anywhere with an internet connection.
Remote Access
Users can access data from any location.
Data Backup
Files stored in the cloud are protected from local device failure.
Collaboration
Multiple users can work on the same files simultaneously.
Scalability
Storage and computing resources can easily be increased when needed.
Popular cloud platforms include:
These services allow users to store documents, photos, videos, and other data online.
Internet and web technologies have transformed how people communicate, learn, and access information. The Internet provides a global infrastructure for connecting computers, while the World Wide Web enables users to access web pages and multimedia content through browsers. Search engines help users quickly find information online, and services such as email and cloud computing support communication and data storage. Understanding these technologies is essential for effectively using modern digital systems and participating in today's connected world.