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00 Overview

What is the Internet​

The Internet is a global network of computers connected to each other which communicate through a standardized set of protocols.

Transfer mediums​

  • Cables: Ethernet cables, fiber optic cables
  • Wires: Wi-Fi, 5G, radio waves

Protocols​

  • TCP/IP: A standardized set of protocols for communicating between computers.
  • DNS: A protocol for translating domain names to IP addresses.

Packets, Routers, and Reliability​

  • Packet: A small piece of data that is sent from one computer to another.
  • Router: A device that forwards packets from one computer to another.
  • Reliability: A measure of how likely it is that a packet will arrive at its destination.

HTTP and HTML​

  • HTTP: A protocol for communicating between a web browser and a web server.
  • HTML: A markup language for describing the structure of a web page.

Encryption and Public Keys

  • Encryption: A process of encoding data in such a way that only the intended recipient can decode it.
  • Public key: A key that can be used to encrypt data, but cannot be used to decrypt it.
  • Private key: A key that can be used to decrypt data, but cannot be used to encrypt it.

Cybersecurity and Crime​

  • DDenial of Service (DoS) and Distributed Denial of Service (DDoS): A type of cyberattack that causes a computer to become unresponsive by overwhelming it with requests.
  • Phishing: A type of cyberattack that attempts to trick a user into revealing personal information.
  • Malware: A type of software that is designed to harm a computer.