Lesson Overview
This lesson introduces learners to web technologies, internet concepts, and online communication systems used in modern digital environments. Learners will explore websites, web browsers, web servers, domain names, internet protocols, search engines, and online communication technologies that support business operations, cloud systems, and automation platforms.
Lesson Outcomes
After completing this lesson, learners will be able to:
- Explain internet and web technology concepts
- Identify components of websites and web systems
- Describe the functions of web browsers and web servers
- Explain domain names and internet protocols
- Describe the role of search engines
- Identify common online communication technologies
KT0601: Introduction to the Internet
The internet is a global network of interconnected computers and devices that communicate and exchange information.
The internet allows users to:
- Access websites
- Send emails
- Stream media
- Share files
- Use cloud services
- Communicate online
Modern businesses rely heavily on internet technologies for:
- Communication
- E-commerce
- Automation
- Cloud computing
- Remote work
How the Internet Works
Devices connect to the internet through:
- Internet Service Providers (ISPs)
- Routers
- Network infrastructure
Information travels across networks using:
- Data packets
- Communication protocols
- Servers and clients
Internet Services
Common internet services include:
- Websites
- Video conferencing
- Online storage
- Social media
- Streaming platforms
KT0602: Websites and Web Pages
A website is a collection of related web pages accessible through the internet.
Websites provide information, services, and online functionality.
Examples include:
- Business websites
- Online stores
- Educational platforms
- News websites
- Government portals
Web Pages
A web page is a single document displayed within a web browser.
Web pages may contain:
- Text
- Images
- Videos
- Links
- Forms
- Interactive content
Static vs Dynamic Websites
Static Websites
Display fixed content that changes rarely.
Dynamic Websites
Generate changing content based on:
- User input
- Databases
- Real-time information
Most modern websites are dynamic.
KT0603: Web Browsers and Web Servers
Web browsers and web servers work together to deliver websites to users.
Web Browsers
A web browser is software used to access and display websites.
Examples include:
- Google Chrome
- Mozilla Firefox
- Microsoft Edge
- Safari
Browser Functions
Browsers:
- Display web pages
- Process web content
- Run scripts
- Manage downloads
- Store browsing history
Web Servers
A web server stores and delivers website files to users over the internet.
When users visit a website:
- The browser sends a request
- The server processes the request
- The server sends website data back to the browser
Examples of Web Server Functions
- Hosting websites
- Managing website traffic
- Processing requests
- Delivering online applications
KT0604: Domain Names and IP Addresses
Every device connected to the internet has an IP address.
An IP address is a numerical identifier used to locate devices on networks.
Example:
192.168.1.1Domain Names
Domain names are human-readable website addresses.
Examples:
- google.com
- openai.com
- amazon.com
Domain names make websites easier to remember.
Domain Name System (DNS)
DNS converts domain names into IP addresses.
Without DNS, users would need to remember numeric IP addresses for websites.
KT0605: Internet Protocols
Protocols are rules that allow devices and systems to communicate over networks.
Common Internet Protocols
| Protocol | Function |
|---|---|
| HTTP | Transfers web pages |
| HTTPS | Secure web communication |
| FTP | File transfers |
| SMTP | Email sending |
| TCP/IP | Core internet communication |
HTTP and HTTPS
HTTP
Transfers website data between browsers and servers.
HTTPS
Provides secure encrypted communication.
HTTPS improves:
- Privacy
- Security
- Data protection
KT0606: Search Engines
Search engines help users locate information on the internet.
Examples include:
- Bing
- Yahoo
How Search Engines Work
Search engines:
- Crawl websites
- Index information
- Rank search results
- Display relevant content
Importance of Search Engines
Search engines help users:
- Find information quickly
- Research topics
- Access websites
- Locate online services
Businesses use search engines to:
- Improve visibility
- Market products
- Reach customers
KT0607: Online Communication Technologies
The internet supports many forms of online communication.
Electronic mail allows users to send digital messages.
Video Conferencing
Platforms support:
- Online meetings
- Virtual classrooms
- Remote collaboration
Examples:
- Zoom
- Microsoft Teams
- Google Meet
Instant Messaging
Allows real-time text communication.
Examples:
- Telegram
- Slack
Social Media Platforms
Support:
- Content sharing
- Communication
- Marketing
- Collaboration
Importance of Web Technologies in Modern Systems
Web technologies support:
- E-commerce
- Cloud computing
- Remote work
- Automation platforms
- Online education
- Digital communication
Modern organisations rely heavily on internet technologies to:
- Deliver services
- Communicate globally
- Manage information
- Support digital transformation
Understanding web technologies helps learners:
- Navigate digital systems
- Use online services effectively
- Support business technologies
- Understand internet-based applications
Web technologies are foundational components of modern computing and 4IR environments.