Network Review: Connecting the World

Learning Objectives Define what a computer network is using an analogy. Identify three key parts of a network: a device, a router, and a server. Explain that information is sent in small pieces called 'data packets'. Describe the simple path a data packet takes from a computer to a server. Draw a basic diagram of a home network connecting to the internet. Explain the difference between a local network (like in a house) and a wide network (the internet). Have you ever wondered how you can watch a video on a tablet that isn't stored on the tablet itself? 🎬 It's not magic, it's a computer network! In this lesson, we will explore the amazing digital spiderweb that connects computers all over the world. We will learn about the special parts that make up...

TermDefinitionExample NetworkA group of two or more computers or devices that are connected to each other to share information.All the computers in your school's computer lab are a network. Your family's phones, tablets, and laptops connected to your home Wi-Fi are also a network. DeviceAny machine that can connect to a network, like a computer, laptop, tablet, or phone.The smartphone you use to play a game is a device on the network. RouterA special device that acts like a traffic cop for the network. It tells all the messages where to go.The little box with blinking lights in your house that gives you Wi-Fi is a router. It directs internet traffic to your laptop or tablet. ServerA very powerful computer that stores and serves up information, like websites, videos, or game worl...

Message Sending Algorithm 1. Break message into packets. 2. Send packets to router. 3. Router sends packets to destination. 4. Reassemble message. This is the step-by-step process for sending any information online. Everything from an email to a game move follows these steps to travel across the network. Website Request Pattern Your Device -> Your Router -> The Internet -> Website's Server This is the path your request follows when you want to see a website. The server then sends the website back to you along the same path in reverse. Local vs. Global Rule If devices are in the same room or building, it's a Local Area Network (LAN). If they are far apart (in different cities or countries), it's a Wide Area Network (WAN). Use this rule to figur...