Topic 10

Robert Elliot Kahn's Definition of the Internet:
- The Internet is described as a vast, worldwide system of interconnected computer networks.
- It is referred to as a "network of networks" linking billions of devices globally.
- Standardized protocols such as TCP/IP (Transmission Control Protocol/Internet Protocol) are employed to share information and communicate.
- The infrastructure of the Internet supports services like the World Wide Web (websites), email, streaming, and social media.
- It functions similarly to a digital road for data packets that travel between devices, enabling instant access to vast information and digital interaction.
- The Internet is noted for evolving rather than being invented; it originated from ARPANET (Advanced Research Project Agency Network).
- ARPANET was created for researchers from universities and research centers to establish robust communications capable of surviving the Cold War.
- Key individuals in Internet development include Robert Kahn and Vinton Cerf, who developed the TCP/IP protocols adopted on January 1, 1983; this date is considered the "birthday" of the Internet.

High-Speed Internet Access:
- It is characterized by always-on connectivity, high bandwidth, and quick data transmission, replacing the slower dial-up connections.
- Essential for activities like streaming, online gaming, and video calls across multiple devices.
Common Broadband Technologies:
- Fiber Optic: Uses glass or plastic strands to transmit data as pulses of light. Enables fast, reliable internet, ideal for high-demand applications.
- DSL (Digital Subscriber Line): Delivers high-speed internet over existing copper telephone lines without tying up the phone line for calls. Variants include ADSL (faster downloads) and SDSL (equal upload/download speeds).
- Cable Internet: Utilizes coaxial cables from cable TV infrastructure to provide high-speed web access, functioning through two-way data flow between home networks and ISPs.
- Satellite Internet: Offers broadband access in remote areas, utilizing multiple satellite dishes to link devices and maintain network connectivity.
- 4G/5G Wireless: Employs radio waves for mobile connectivity, facilitating internet access through mobile devices without physical cables.

Dial-Up Connection:
- An older method of internet access using standard telephone lines, converting digital data into sound signals via a modem.
- Popular before broadband, maxed out at speeds of approximately 56 kbps (kilobits per second).
- This method ties up the phone line, preventing simultaneous voice calls, and is significantly slower compared to modern technologies.

Definition:
- A company that provides individuals and businesses with access to the Internet, acting as a gateway to the World Wide Web.
- ISPs offer services like email, web hosting, and domain registration using technologies such as cable, fiber, or wireless connections.
Diverse Types of Providers:
- Range from basic internet access (e.g., Comcast, PLDT, Globe) to specialized services such as email (e.g., Gmail), streaming (e.g., Netflix), e-commerce (e.g., Amazon), social media (e.g., Facebook), or cloud storage (e.g., Google Drive).
Wireless Internet Service Providers (WISPs):
- Deliver internet via radio signals, especially beneficial in rural areas lacking traditional wired options, using various bands for connectivity.

Overview:
- The WWW is an information system where documents and resources are identified by Uniform Resource Locators (URLs) and are accessible via the Internet.
- Documents are interconnected through Hyperlinks, allowing users to navigate between different web pages.
Development by Tim Berners-Lee:
- He envisioned a platform for scientists worldwide to share information instantly, creating HTML (HyperText Markup Language), the URL system, and HTTP (Hypertext Transfer Protocol).

Web 1.0:
- The first stage known as the "Read-Only Web"; characterized by static websites where users cannot interact.
- Information is presented similar to books or newspapers, with examples including Britannica Online, The New York Times, and early websites like the Space Jam site (1996).
Web 2.0:
- Referred to as the "Social Web", allows user interaction, comments, and content creation.
- Examples include Facebook, YouTube, and LinkedIn, where users can create accounts and share content.
Web 3.0:
- Identified as the "Semantic Web", utilizes AI to understand user preferences based on their data and browsing habits.
- This version provides personalized search results and recommendations through technologies like Siri, Alexa, ChatGPT, and Bixby.

Definition of Internet Services:
- Refers to data and services available publicly to users, facilitating daily tasks such as browsing, email communication, and information retrieval.

Electronic Mail (Email):
- Allows for instantaneous exchanges of messages, distinguishing itself from traditional mail by immediate delivery.
Video Conferencing:
- Facilitates real-time visual communication over the internet.
Instant Messaging:
- Enables synchronous text communication between users.
E-Commerce:
- The virtual buying and selling of goods and services online.
Web Services:
- Platform for applications to communicate and share data over the web.
File Transfer:
- The process of securely moving files between computers or networks.
Internet Relay Chat (IRC):
- A protocol for real-time text communication between users.
Voice over Internet Protocol (VoIP):
- A technology allowing calls over the internet as an alternative to traditional phone lines.
Newsgroup:
- Online communities based on shared interests where users can post messages.
Electronic Fax:
- Sending documents directly through the internet.

Definition:
- Refers to the proper way of communicating in online environments, emphasizing respect and thoughtful interactions.
Core Guidelines Adapted from Virginia Shea's Rules:
1. Practice the Golden Rule: Treat others as you wish to be treated.
2. Be Respectful: Your communication should reflect respect toward others.
3. Adapt to Context: Understand that appropriate communication may vary by context.
4. Be Concise: Recognize that time is valuable; avoid unnecessary length in messages.
5. Focus on Quality: Your reputation online is based on writing quality, so check for errors and communicate clearly.

Benefits:
- Rapid access and sharing of information; a core reason for the Internet's inception.
Challenges:
- Issues such as "flaming" (expressing strong opinions emotionally) and the resulting "flame wars" (angry exchanges between users) need to be managed to maintain community harmony.
- Respect privacy and handle sensitive information with care.
- Recognize the varying levels of experience and knowledge among online participants; practice kindness.

The Internet has transformed how we share information, communicate, and conduct commerce, creating numerous digital services and opportunities while demanding responsible usage and etiquette.