Networks Explored: LAN and WAN
Year 9 Technology Understanding Local and Wide Area Networks Network Devices and Their Functions
Where Do You Use Networks?
Think about your daily digital activities School computers and WiFi Home internet and streaming Mobile phone connections
What is a Local Area Network (LAN)?
A network within a limited geographical area Examples: School network, home network, office building Devices connected within the same location Fast data transfer speeds Owned and managed by one organization
What is a Wide Area Network (WAN)?
A network spanning large geographical areas Connects multiple LANs together Examples: The Internet, company networks across cities Uses telecommunication links Can span countries or continents
Network Device Detective
Work in pairs to identify network devices Match each device to its function Discuss where you might find each device Be ready to share your answers!
Essential Network Devices
{"left":"Router: Connects different networks together, directs data between LANs and WANs\nSwitch: Connects devices within a LAN, creates separate collision domains\nHub: Basic device that connects multiple devices (largely obsolete)","right":"Access Point: Provides wireless connectivity to a wired network\nModem: Converts digital signals for transmission over telephone/cable lines"}
Design Your Network
Groups of 4-5 students Draw a simple LAN or WAN diagram Include appropriate network devices Show how data flows through your network Label all devices and connections
LAN vs WAN: Advantages and Disadvantages
{"left":"LAN Advantages: Fast data transfer, easy to manage, secure, cost-effective for small areas\nLAN Disadvantages: Limited geographical coverage, single point of failure risk","right":"WAN Advantages: Global connectivity, connects remote locations, enables internet access\nWAN Disadvantages: Slower speeds, higher costs, more complex security, dependent on service providers"}
Quick Check: Test Your Knowledge
What device connects your home LAN to the internet? Name one advantage of a school LAN Why might a company use a WAN? Which is faster: LAN or WAN connections?
Key Takeaways
LANs connect devices in small areas like schools and homes WANs connect LANs across large distances Routers connect networks, switches connect devices Each network type has advantages and disadvantages Understanding networks helps us use technology effectively