ch3_pdf_book_EN

ICT for iGeneration

Internet and its Applications

Internet Applications

• Benefits:

  • Access to information anytime, anywhere.

  • Easy global information sharing.

Internet of Things (IoT)

• Definition: Network connecting various objects (e.g., appliances, devices).

Cloud Services

• Data Handling: IoT generates vast data; cloud computing stores/processes it.

• Definition: Internet storage on remote servers.

• Benefits: Accessibility, resource management.

• Collaboration: Supports real-time sharing and co-editing.

Smart City Development

• Goals: Improve urban decision-making and quality of life.

  • Focus on:

    • Environmental sustainability

    • Traffic congestion

    • Waste management

    • Ageing populations

E-Banking and Digital Payments

• Trends: Growth due to internet and mobile devices.

• Popular Platforms: PayPal, FPS, PPS.

• Payment Methods: Rechargeable cards, credit/debit cards, mobile wallets.

Online Services Overview

• Types:

  • Email

  • Remote logon

  • Online chat

  • SNS

  • File transfer

Email Communication

• Components: Username, @ symbol, domain name.

• Components of Email:

  • To: Primary recipients of the email; they are the main audience for the message.

  • Cc (Carbon Copy): Secondary recipients who receive a copy of the email for their information; visible to all recipients.

  • Bcc (Blind Carbon Copy): Recipients who receive a copy of the email without other recipients knowing; their addresses are hidden.

• Functions:

  • Reply: Responding to the sender of the email.

  • Reply All: Responding to everyone included in the email conversation.

  • Forward: Sending the email to a new recipient.

• Safety Considerations:

  • Spam management: Users should be cautious about unsolicited emails.

  • Safe sender approvals: Users can whitelist trusted senders to avoid missing important emails.

  • Email encryption: Consider using encryption tools to protect sensitive information when sending emails.

Remote Logon

• Definition: Access device remotely via Internet/LAN.

• Benefits: Software access, quick troubleshooting.

• Limitations: Internet dependency, potential breaches.

File Transfer Methods

• Common Methods: Email, cloud storage, P2P sharing.

• Pros/Cons Analysis: Consider cost, security, and quality.

Information Search Strategies

• Steps:

  1. Define needs

  2. Decide search locations

  3. Develop strategy

  4. Refine search.

• Evaluation: Reliability, credibility, timeliness.

Multimedia

• Use: Enhances engagement and diverse learning.

• Advantages of Using Different Image Formats on Websites:

  • JPG:

    • Compression: Lossy compression that reduces file size significantly, ideal for photographs where slight quality loss is acceptable.

    • Color Depth: Supports a wide range of colors, enhancing photo quality.

  • PNG:

    • Lossless Compression: Maintains quality as no data is lost, suitable for images requiring transparency and sharper edges, like logos and icons.

    • Better Text Clarity: Text and simple graphics remain clear even after compression.

  • WebP:

    • Efficient Compression: Supports both lossy and lossless compression, providing smaller file sizes without sacrificing quality.

    • Transparency and Animation: Combines features of both PNG and GIF, allowing for high-quality animated images.

  • SVG:

    • Scalability: Vector format that can be scaled up or down without losing quality, ideal for logos and icons.

    • Interactivity: Can include animations and styling with CSS, making them versatile for web applications.

• Codec Applied in Video Format and Browser Support Issues:

• • Codecs: Software to encode or decode digital data, specifically video and audio formats. Common codecs include H.264, VP9, and AV1.

  • Browser Support: Different browsers may support different codecs. For instance, H.264 has widespread support across browsers, while VP9 is favored by Google Chrome and Firefox. AV1 is newer and gaining traction but is not universally supported yet across all platforms.

• Browser Plug-ins (Extensions) and Their Functions:

  • Enhancements: Plug-ins allow users to add additional features to their browser, enhancing functionality, such as ad-blockers, password managers, and productivity tools.

  • Customization: Users can tailor their browsing experience to meet their needs; for example, tools for video downloading, bookmarking, or note-taking can be added.

  • Integration: Plug-ins often connect the browser with other applications or services, improving workflows and efficiency in tasks like web development or online shopping.

• Streaming: Refers to the process of transmitting audio and video content over the internet in real-time.

• Internet Protocols for Streaming:

  • Utilizing protocols such as RTP (Real-time Transport Protocol) and RTSP (Real Time Streaming Protocol) to facilitate smooth delivery of multimedia content over the internet.

• Buffering:

  • Definition: A process where a portion of data is preloaded into memory to ensure continuous playback without interruptions.

  • Importance: Helps to manage data transmission so that playback can occur without buffering delays, especially when network speeds vary.

  • Buffering Strategies: Adjusting the amount of data stored ahead of playback based on current bandwidth to maintain video/audio quality and reduce load times.