What is the Internet?

Learning Objectives Explain that data travels across the internet in small pieces called packets. Describe the role of a router as a 'traffic director' for internet data. Define an IP address and explain its purpose as a unique device address. Explain how the Domain Name System (DNS) acts like the internet's phonebook. Trace the basic path of a request from a client (their computer) to a server (a website). Convert a simple number from an IP address into 8-bit binary. Ever wonder how a message you send in a game instantly reaches a friend across the world? 🚀 It's not magic, it's a super-fast delivery system with some very cool rules! In this lesson, we'll uncover the secret helpers and rules that make the internet work. We'll learn about...

TermDefinitionExample PacketA small piece of a larger chunk of data. The internet breaks down everything—pictures, videos, messages—into thousands of tiny packets to send them.If you send a picture of your dog, the internet might chop it into 500 packets. Each packet is like a single puzzle piece sent separately. IP Address (Internet Protocol Address)A unique address for every device connected to the internet, just like a house has a mailing address. It's made of numbers.A computer's IP address might look like `192.168.1.10`. This tells other computers exactly where to send packets. RouterA device that acts like a traffic director for the internet. It reads the IP address on a packet and decides where to send it next to get it closer to its destination.Your Wi-Fi box at home is...

Packet Switching Pattern 1. Break data into packets. 2. Address each packet. 3. Send packets via routers. 4. Reassemble packets at the destination. This is the fundamental rule for sending anything over the internet. It's efficient because if one packet gets lost, only that small piece needs to be resent, not the whole file. DNS Lookup Algorithm IF you know the IP address, connect directly. ELSE, ask the DNS server for the IP address that matches the domain name. THEN, use the IP address to connect. Computers use this simple conditional logic every time you visit a new website. It's the first step before any data can be requested.