5.1 Concept of WWW, Browser, Search Engine, and URL

World Wide Web (WWW)

The World Wide Web, usually called the Web or WWW, is a huge collection of webpages connected to each other through links, all accessible over the internet. It’s important to know that the internet and the web are not the same thing:

• Internet — the global network of connected computers and cables that carries data around the world
• Web (WWW) — a service that runs on top of the internet, made up of websites and webpages you view through a browser

Think of the internet as the roads, and the web as the shops and buildings you visit by traveling on those roads. Other services like email and video calls also travel over the internet, but they aren’t part of the “web” itself.

Web Browser

A web browser is software used to access, display, and interact with webpages. Common browsers include Google Chrome, Mozilla Firefox, Microsoft Edge, and Safari. A browser’s job is to:

• Send a request to a web server for a page
• Receive the page’s HTML, CSS, images, and other files
• Display everything correctly on your screen

Search Engine

A search engine is a website or tool that helps you find other webpages by typing in keywords, since there is no single list of every website in existence. Popular search engines include Google, Bing, and DuckDuckGo.

When you search something, the search engine doesn’t search the whole internet in real time instead, it looks through its own huge, constantly updated index of webpages it has already scanned in advance, and shows you the most relevant matches.

URL (Uniform Resource Locator)

A URL is the address of a specific webpage or file on the internet. It tells your browser exactly where to find something. A typical URL looks like this:

https://computerkite.com/notes-grade-9-computer-science/

Breaking this down:

• https:// — the protocol used to load the page (explained in section 5.3)
• www.computerkite.com — the domain name, which identifies the website
• /notes-grade-9-computer-science — the specific path or page location on that website

5.2 Concept of Remote Login (AnyDesk, TeamViewer)

Remote login is the process of accessing and controlling a computer from a different location, over the internet, as if you were sitting right in front of it. This is done using remote access software.

How Remote Login Works

1. Remote access software (such as AnyDesk or TeamViewer) is installed on both computers the one being controlled and the one controlling it
2. The person on the “host” computer generates a unique ID and password, and shares it with the person who needs to connect
3. The other person enters that ID into their own copy of the software to request a connection
4. Once accepted, the connecting computer can see and control the host computer’s screen in real time

Common Remote Login Tools

• AnyDesk — lightweight software known for fast connections, often used for tech support and remote work
• TeamViewer — one of the most widely used tools, popular for both personal and business remote support
• Chrome Remote Desktop — a free option that works through the Chrome browser

Uses of Remote Login

• IT technicians fixing a computer problem without visiting in person
• Employees accessing their office computer from home
• Teachers helping students troubleshoot software issues remotely
• Accessing files on a computer while traveling

Because remote login gives full control over a computer, it should only be used with people and software you trust, since a malicious person with remote access could view or steal private files.

5.3 Concept of Protocols (HTTP, HTTPS)

A protocol is a set of rules that computers follow so they can communicate with each other correctly. Just like people follow rules of grammar to understand each other, computers follow protocols to exchange data without confusion.

HTTP (HyperText Transfer Protocol)

HTTP is the protocol used to transfer webpages from a web server to your browser. Whenever you visit a website, your browser and the server communicate using HTTP rules to request and deliver the page’s content.

HTTPS (HyperText Transfer Protocol Secure)

HTTPS is the secure version of HTTP. It encrypts the data sent between your browser and the website’s server, meaning the information is scrambled so outsiders can’t read it even if they intercept it. This is especially important for websites that handle passwords, banking details, or personal information.

A simple safety habit: always check that a website’s address starts with https:// and shows a padlock icon before entering any personal information, such as a password or payment details.

Other Common Protocols

• FTP (File Transfer Protocol) — used to transfer files between computers over a network
• SMTP (Simple Mail Transfer Protocol) — used to send emails
• TCP/IP — the underlying set of rules that manages how data is broken into packets and delivered correctly across the internet

5.4 Email and Its Uses

Email (electronic mail) is a way of sending and receiving digital messages over the internet. It’s one of the oldest and most widely used internet services, still central to school, work, and business communication today.

Parts of an Email Address

studentname@gmail.com

• studentname — the username, chosen by the account holder
• @ — separates the username from the domain, read as “at”
• gmail.com — the domain, showing which email provider hosts the account

Common Email Providers

Gmail, Outlook, and Yahoo Mail are among the most widely used free email services.

Uses of Email

• Sending messages, documents, and files to teachers, classmates, or employers
• Receiving notifications from websites, schools, and online services
• Signing up for and logging into other online accounts, since most services require an email to register
• Sending attachments such as assignments, images, or reports
• Communicating professionally in a way that can be saved and referred back to later

Basic Email Etiquette

• Always include a clear subject line describing what the email is about
• Use a proper greeting and closing (for example, “Dear Sir/Madam” and “Regards”)
• Avoid writing in all capital letters, since it can be read as shouting
• Double-check the recipient’s address before sending

5.5 Appropriate Usage of Social Media and Safely Accessing Websites

What Counts as Social Media

Social media refers to websites and apps that let people create profiles, share content, and interact with others online. Examples include Facebook, Instagram, X (formerly Twitter), YouTube, and TikTok.

Appropriate Usage Guidelines

• Follow the platform’s minimum age requirement, and only create an account if you meet it or have permission from a parent or guardian
• Never share personal information publicly, such as your home address, school name, phone number, or daily routine
• Think before posting anything shared online can be screenshotted, copied, or seen by people beyond your intended audience
• Be respectful in comments and messages; avoid participating in bullying or spreading rumors
• Report and block accounts that are abusive, threatening, or make you uncomfortable
• Balance screen time with offline activities, since excessive social media use can affect sleep, focus, and mental well-being

Safely Accessing Websites

• Check for https:// and a padlock icon before entering any personal or payment information
• Avoid clicking links from unknown senders in emails or messages, as these can lead to fake or harmful websites
• Be cautious of pop-ups claiming you’ve “won a prize” or need to “verify your account immediately” these are common scam tactics
• Keep your device’s antivirus software and browser updated to catch security threats
• Use strong, unique passwords for different accounts, and avoid sharing them with anyone

5.6 Introduction to Video Conference Tools (Zoom, Google Meet, MS Teams)

Video conferencing tools allow multiple people in different locations to see and talk to each other in real time over the internet, using a camera and microphone. These became especially important for remote schooling and work.

Common Video Conferencing Tools

• Zoom — widely used for online classes, meetings, and webinars, known for features like breakout rooms and screen sharing
• Google Meet — built into Google’s suite of tools, easy to launch directly from Gmail or Google Calendar
• Microsoft Teams — combines video calls with chat and file sharing, often used in schools and workplaces that already use Microsoft software

Common Features

• Screen sharing, to show a presentation or document to everyone on the call
• Chat, for sending messages during the meeting without interrupting the speaker
• Mute/unmute and camera on/off controls
• Recording, to save a meeting for people who couldn’t attend
• Virtual backgrounds, to hide the user’s real surroundings

Good Practices During Video Calls

• Join with your microphone muted unless you’re speaking, to avoid background noise
• Test your camera and audio before an important meeting starts
• Use a stable internet connection where possible to avoid disruptions
• Dress and behave appropriately, since you may be visible to teachers, classmates, or colleagues

5.7 Concept of Blogs and Its Features

A blog (short for “web log”) is a website or section of a website where a person or organization regularly publishes articles, updates, or personal entries, usually shown in order from newest to oldest.

Features of a Blog

• Posts — individual articles or entries, each with its own title, date, and content
• Comments section — lets readers respond to a post and discuss it
• Categories and tags — organize posts by topic, making them easier to browse or search
• Author profile — shows who wrote each post, especially on blogs with multiple contributors
• Archive — a list of older posts, usually organized by month or year
• Subscribe/follow option — lets readers get notified whenever a new post is published

Popular Blogging Platforms

• Blogspot (Blogger) — a free, beginner-friendly platform owned by Google
• WordPress — one of the most widely used platforms, ranging from simple free blogs to fully custom websites
• GitHub Pages — often used by students and developers to host simple blogs or portfolios for free using code

Why People Create Blogs

• To share knowledge or teach others about a topic, like these study notes
• To document personal experiences, such as travel or hobbies
• To promote a business, product, or service
• To build an online portfolio of writing or work samples

Practical Tasks

1. Demonstrate the mechanism of searching for different learning materials from the internet, using a search engine to find and evaluate reliable results.
2. Create a profile using a social media platform like Facebook, YouTube, or X, if your age allows it, following appropriate privacy settings.
3. Create a virtual meeting using an application such as Zoom, Google Meet, or Microsoft Teams, and practice using features like screen sharing and mute/unmute.
4. Create a personal web blog using a suitable tool, such as Blogspot or GitHub, and publish at least one post.