Lesson Notes By Weeks and Term v5 - Grade 11

Lesson Video

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Performance objectives

• Define online services and cloud applications.
• Explain the pros and cons of cloud computing in a South African context.
• Identify and use common cloud applications.
• Understand security and privacy implications.
• Evaluate different cloud service models: IaaS, PaaS, and SaaS.

Lesson summary

This week, we delve into the world of internet technologies, specifically focusing on online services and cloud applications. These technologies are fundamentally changing how we access information, collaborate, and conduct business in South Africa and globally. From accessing educational resources online to using cloud-based accounting software in local businesses, understanding these concepts is crucial for success in the modern world. South Africa faces unique challenges regarding internet access and affordability, making it even more important for you to understand how to leverage these tools effectively and efficiently.

Lesson notes

Online Services: These are services provided over the internet. They can be free or paid, and they encompass a wide range of functionalities, including communication, entertainment, information access, and productivity tools. Examples include email (Gmail, Yahoo Mail), social media (Facebook, Twitter, Instagram), online banking, e-commerce (Takealot, Bidorbuy), and streaming services (Netflix, Showmax, Spotify).

Cloud Applications: These are applications that run on remote servers (the "cloud") instead of on a user's local device. Users access these applications through a web browser or a dedicated app. Data is stored and processed on these remote servers.

Advantages of Cloud Applications: Accessibility: Access from anywhere with an internet connection. Imagine a group working on a school project. One student is at home, another at a library, and another traveling. With Google Docs (a cloud application), they can all collaborate in real-time.

Scalability: Resources can be easily scaled up or down based on demand. A small business in Soweto can start with minimal cloud storage and increase it as their business grows, without needing to invest in expensive hardware.

Cost-effectiveness: Often cheaper than traditional software due to lower upfront costs and maintenance expenses. Instead of buying expensive software licenses for each computer in a computer lab, a school can use online educational platforms that run in the cloud, reducing costs considerably.

Automatic Updates: Software updates are handled by the service provider, reducing the burden on users.

Collaboration: Facilitates real-time collaboration on documents and projects.

Disadvantages of Cloud Applications: Internet Dependency: Requires a reliable internet connection. This can be a significant challenge in areas of South Africa with poor internet infrastructure.

Security and Privacy Concerns: Data is stored on third-party servers, raising concerns about security breaches and privacy. It’s crucial to understand the security measures taken by the cloud provider.

Vendor Lock-in: Switching between cloud providers can be complex and costly.

Limited Control: Users have less control over the underlying infrastructure and software.

Cloud Service Models: These define the types of services offered by cloud providers: IaaS (Infrastructure as a Service): Provides access to fundamental computing resources like virtual machines, storage, and networks.

Example: Amazon Web Services (AWS) EC2, Microsoft Azure Virtual Machines. Think of it as renting the raw materials to build your own house. You have complete control, but you also have to do all the work.

PaaS (Platform as a Service): Provides a platform for developing, running, and managing applications without the complexity of managing the underlying infrastructure.

Example: Google App Engine, Heroku. Think of it as renting a plot of land with pre-built infrastructure like water and electricity connections. You can build your house, but you don’t have to worry about setting up the basic utilities.

SaaS (Software as a Service): Provides ready-to-use software applications over the internet.

Example: Google Workspace (Docs, Sheets, Slides), Salesforce, Dropbox. Think of it as renting a fully furnished apartment. Everything is ready to use; you just move in and start living. Examples of Cloud Applications Relevant to South African Learners: Google Workspace (formerly G Suite): Docs, Sheets, Slides, Drive – for document creation, spreadsheets, presentations, and cloud storage. Useful for school projects, creating CVs, and managing personal files.

Microsoft 365: Word, Excel, PowerPoint, OneDrive – similar functionality to Google Workspace.

Zoom/Google Meet/Microsoft Teams: Video conferencing tools for online classes, group meetings, and virtual collaboration.

Dropbox/Google Drive/OneDrive: Cloud storage for backing up important documents, photos, and videos.

Canva: Online graphic design tool for creating posters, social media graphics, and presentations. Particularly useful when resources for creating attractive visuals are limited.

Security Considerations: Strong Passwords: Use strong, unique passwords for all online accounts.

Two-Factor Authentication (2FA): Enable 2FA wherever possible to add an extra layer of security.

Phishing Awareness: Be aware of phishing scams and avoid clicking on suspicious links or opening attachments from unknown senders.

Privacy Settings: Review and adjust privacy settings on social media and other online services to control who can see your information.

Data Encryption: Use encryption to protect sensitive data stored in the cloud.

Regular Backups: Back up important data regularly to protect against data loss. Guided Practice (With Solutions)

Question 1: List three advantages and one disadvantage of using Google Docs (a SaaS application) for a group project compared to using Microsoft Word installed on each student's computer.