Ch 3.4 Network Hardware (FULL) | Ch 3 Hardware | O Level / IGCSE CS | 2210/0478

O Levels Notes Links Annotated PDFs https://drive.google.com/drive/folder... P1 Notion Site https://brawny-canid-46b.notion.site/... Paper 2 OneNote https://1drv.ms/o/c/1b1616c4cd94fcff/... Paper 2 PDFs https://drive.google.com/drive/folder... Follow us on Instagram for quick tips & updates: 👉 [  / kurlyatzainematics  ](  / kurlyatzainematics  ) Learn *Network Hardware (Ch 3.4)* from the O Level / IGCSE Computer Science syllabus (2210 / 0478, Paper 1). This video covers all essential devices used in computer networks, how they work, where they’re used, and how they appear in exam-style questions. 📌 What you’ll learn in this lesson: ✅ *Network Hardware Overview* Understand the role of devices in building LANs, WANs, and the internet. ✅ *Core Networking Devices* • *Router* – routes data between networks (LAN → WAN / internet) • *Switch* – connects devices within the same LAN and forwards data efficiently • *Hub* – broadcasts data to all devices (why it’s outdated) • *Modem* – converts digital ↔ analog signals for ISP communication • *Network Interface Card (NIC)* – allows a device to connect to a network (wired/wireless) ✅ *Connection Media* • *Twisted Pair (Ethernet)* • *Fiber Optic* • *Wireless (Wi-Fi / Radio waves)* Understand advantages, disadvantages, and where each is used. ✅ *Exam-Focused Understanding* • Identify devices from diagrams • Describe functions clearly in exam keywords • Compare devices (Switch vs Hub, Router vs Modem) ✅ *Common Exam Questions* • "State the purpose of a router." • "Explain how a switch reduces data collisions." • "Identify the device used to connect a computer wirelessly."