LAN vs WAN Networks Explained

Year 9 Technology Understanding Computer Networks 60-minute lesson LAN Network Diagram: Computers connected through a central switch, which connects to a router for internet access. All devices are within the same building or small area, sharing resources like printers and files.

Learning Objectives

Define and explain LAN and WAN characteristics Identify real-life examples of both network types Classify network scenarios correctly Create a comparison chart showing similarities and differences

Starter: Think-Pair-Share

Think: What computer networks do you know? Pair: Share your ideas with a partner Share: Discuss with the whole class Consider: Home, school, and online networks

What is a Local Area Network (LAN)?

Connects computers in a small geographical area Examples: Home WiFi, school network, office building Covers areas like single buildings or campuses Usually owned and controlled by one organisation Fast connection speeds within the network

What is a Wide Area Network (WAN)?

Connects networks across large geographical areas Covers cities, countries, or even continents The Internet is the largest WAN in the world Uses various connection methods (cables, satellites) Enables global communication and data sharing

LAN vs WAN: Visual Comparison

Key Differences: LAN vs WAN

{"left":"Geographic Coverage: Small area (building/campus)\nGeographic Coverage: Large area (cities/countries)\nOwnership: Usually one organisation\nOwnership: Multiple organisations/providers\nSpeed: Very fast (up to 1000 Mbps)","right":"Speed: Varies (depends on connection type)\nCost: Lower setup and maintenance\nCost: Higher due to infrastructure\nSecurity: Easier to secure and control\nSecurity: More complex, requires encryption"}

Guided Practice: Network Scenarios

Scenario 1: Library connecting all computers Scenario 2: Bank with branches worldwide Scenario 3: Gaming café with connected PCs Scenario 4: Video call between countries Work in pairs to classify each as LAN or WAN

Independent Task: Create Your Comparison Chart

Design a poster comparing LAN and WAN Include: definitions, examples, advantages/disadvantages Use colours, diagrams, and clear headings Be creative but accurate! 15 minutes to complete

Plenary: Quick Check

Can you give me one example of a LAN? What makes the Internet a WAN? Which type of network would be faster and why? Extension: How do you think VPNs use WANs securely?