Network and Internet Technologies

Internet Technologies

Legacy Model: Existed between 1989 and 2004.
Initial Idea: Contributing and editing content, but in a limited way.
Low Content Variety: Restricted content, creativity, and business opportunities.
Static Content: Content was largely read-only; users could view but not actively engage.
Content Creation:
- Professional authors created content based on perceived user desires.
- Content production was slow and expensive.
Users as Consumers: Users primarily consumed professionally produced content.
Management: Managers hand-managed publishing businesses.
User Publishing:
- Users could publish personal websites using GeoCities.
- Sites were categorized into virtual "cities" named after real places.
- Yahoo acquired GeoCities and later replaced city categories with Yahoo member names in URLs.
- Approximately 38 million pages were hosted on GeoCities.

Emergence: The term gained prominence after the O'Reilly Media Web 2.0 conference in 2004.
Shift: A notable shift occurred in the mid-2000s in the landscape of the World Wide Web.
Accessibility: Became accessible to more devices and platforms.
Features: Included keyword search, links to other sites, tags, media format extensions, bookmarks, and cookies.
Business Models: Offered new opportunities for emerging business models.
User-Generated Content:
- Blogs, videos, photos, music, etc. were created by users.
- Content variety dramatically increased, while technical quality potentially decreased.
- Authoring platforms enabled widespread publishing.
Competition: Professional authors competed with user-generated content.
Users as Authors: Users generated content themselves.
Management: Web 2.0 managers hand-managed the platforms.
Key Aspects: User-generated content, new platforms (Google, YouTube, Wiki, Facebook, Blogs), participation for everyone, social web, and web services (RSS).

Definition: Dynamic concept without a universally agreed-upon definition.
Content Generation: Systems generate content, and users consume it.
Examples:
- Semantic web.
- Machine Learning and Artificial Intelligence.
- Personalization.
- Decentralization (Blockchain, crypto, NFT, Digital world).

Transformation: Converts heterogeneous web resources into a unified format usable by all devices.
Functionality: Smart search and digital collection of resources.

Transformer Model: Google's "Attention is All You Need" research introduced the Transformer model.
- The model focuses on different parts of the input sequence when making predictions.
Neural Networks: Utilized to train models for generating derivative art, website designs, videos, games, music, etc.
Examples: Midjourney, ChatGPT, DALL-E, Stable Diffusion, LoRA.

Functionality: Autosuggest content, autocomplete text messages, and autofill data forms.
Contextualization: Content is based on the user, platform, and device.
Control: Controlled information, news, search results, video, and audio based on user preferences.

Data Security: Keeps data safe, protected, and public, without being owned by a single organization.
Exchange: Allows the exchange of goods without regulatory mechanisms.
Ownership: Enables owning the original unit of anything digital.
Process:
- A new transaction is entered.
- The transaction transmits to a peer-to-peer computer network.
- The network solves equations to confirm transaction validity.
- Legitimate transactions are clustered into blocks.
- Blocks are chained together, creating a permanent transaction history.

Dead Internet Theory: Activity on the Internet is predominantly automated; users interact with bots unknowingly; algorithms curate content produced by non-humans. This is currently considered a conspiracy theory.

Definition: A group of connected autonomous computer devices.
Architecture: Consists of computer and network devices (PC, printer, router, etc.), cable network, network protocols, and software.
Types:
- Local (LAN - Local Area Network): limited to a location (e.g., home, office, organization).
- Global: Connects computers or networks across a distance.
  - MAN (Metropolitan Area Network): Covers entire cities.
  - WAN (Wide Area Network): Covers larger territories (country or continent).
Management: Centralized (mainframe), peer-to-peer (distributed access), and client/server.
Connectivity: Wired or wireless.

Function: Allows access to resources stored in its memory; placed in server rooms.
Types: Database server, File server, Email server.
Role: Supports computational tasks, data storage, and network-related functions.
Components: Tangible physical components, including CPUs, memory modules, storage devices, and networking interfaces.

Examples: Apache, Nginx, Lighttpd.
Function: Software running on a device that uses OS resources to manage queries received from the network.
Access: Queries may require access to other applications (e.g., mathematical calculations).
Model: Functions on the client-server model, processing HTTP requests, retrieving files, and transmitting them back to users' devices.
Security: Implements security measures (encryption protocols like SSL/TLS, access controls, firewalls).
Logging: Maintains logs of incoming requests, errors, and server activity.

Multiple Servers: On a single physical server, different web servers can run on different ports.
Website Access: Multiple websites can be accessed from various devices and places on each web server.
Scale: According to Internet Live Stats, there are more than 1.8 billion websites online.