Introduction

Overview

Slides

What is the Internet?

Before we learn what the Internet is, we need to understand what a Network is. A network is a group of computers or other devices which are connected to each other. For example, you at your home might have a network of computers and devices. Your friend living next door might have a similar network of devices.

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

• Packet: A small unit of data that is transmitted over the internet.

• Router: A device that directs packets of data between different networks.

• IP Address: A unique identifier assigned to each device on a network, used to route data to the correct destination.

• Domain Name: A human-readable name that is used to identify a website, such as google.com.

• DNS: The Domain Name System is responsible for translating domain names into IP addresses.

• HTTP: The Hypertext Transfer Protocol is used to transfer data between a client (such as a web browser) and a server (such as a website).

• HTTPS: An encrypted version of HTTP that is used to provide secure communication between a client and server.

• SSL/TLS: The Secure Sockets Layer and Transport Layer Security protocols are used to provide secure communication over the internet.

Wires, Cables, and Wi-Fi

Information on the Internet moves from one computer to another in the form of bits over various mediums, including Ethernet cables, fiber optic cables, and wireless signals (i.e., radio waves).