Digital Technology

9 notes tagged Digital Technology.

• Science & Technology

  Wireless and Short-Range Communication

  NFC, RFID, Bluetooth and Wi-Fi all move data through the air with no wire, and the one number that tells them apart every time is range, not what they are used for.

• Science & Technology

  Mobile Networks and Spectrum

  Every mobile generation is really the same argument between two frequency bands: lower frequencies travel further through walls, higher frequencies carry more data, and no operator gets both for free.

• Science & Technology

  Blockchain, Distributed Ledgers and Tokens

  A blockchain is not owned by any single user, and that one sentence explains why it needs consensus, why it can be permissioned or permissionless, and why an NFT can prove ownership without the object ever moving.

• Science & Technology

  The Evolving Web and Immersive Platforms

  Augmented Reality adds to the real world you can still see; Virtual Reality replaces it entirely, and that single distinction is the one a question keeps testing under different names.

• Science & Technology

  India's Digital Public Infrastructure

  India Stack is not one system, it is four separate layers stacked on top of each other, and the layer most people never hear about, Consent, is the one that lets the other three work without becoming a surveillance tool.

• Science & Technology

  Cryptography and Digital Security

  A digital signature does not prove a document is unchanged, it proves who sent it and that it has not been changed since, and Public Key Infrastructure exists entirely to make that second promise checkable by a stranger.

• Science & Technology

  Cyber Threats and Cyber Security

  CERT-In does not stop cyberattacks, it watches, warns and coordinates the response, and knowing that its power is legal and informational rather than technical is the whole answer to most questions about it.

• Science & Technology

  Cloud Computing and Service Models

  IaaS, PaaS and SaaS are not three different technologies, they are the same stack cut at three different heights, and where you cut it decides exactly how much a customer manages versus how much the provider does.

• Science & Technology

  Artificial Intelligence: Capabilities and Limits

  Every AI system in real use today is narrow, meaning it is genuinely excellent at one specific task and cannot do anything outside it, which is exactly the fact a 'which of these is realistic' question is testing.