This deep dive covers Real-World Scenario: School Network Design within Network Topologies for GCSE Computer Science. Revise Network Topologies in 3.5 Fundamentals of Computer Networks for GCSE Computer Science with 16 exam-style questions and 18 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 9 of 12 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Real-World Scenario: School Network Design
Imagine you're the IT manager designing a network for a large secondary school with 1000 devices:
Why Star Topology is Chosen:
- Each classroom has 30 computers connecting to a floor switch (star within classroom)
- Floor switches connect to a central server room switch (hierarchical star)
- If Computer 12's cable breaks, only that computer is affected - the other 29 keep working
- Easy to troubleshoot: "Room 302's switch has failed" rather than "something is wrong somewhere in the bus cable"
- Easy to expand: new computer lab? Just run cables to a new switch
- Cost-effective for 1000 devices (mesh would need 499,500 cables!)
Why NOT Other Topologies:
- Bus: One cable break = entire school offline. Performance terrible with 1000 devices
- Ring: One cable break = entire school offline. Adding new lab disrupts whole network
- Mesh: Would cost millions in cabling. 1000 devices = ~500,000 cables needed!
Trade-off Accepted:
The central server room switch is a single point of failure, BUT the school has a backup switch ready to swap in immediately if it fails. This is more practical than running half a million cables for full mesh!
Practice questions for Network Topologies
In a star network topology, all devices connect to which central component?
State two advantages of a mesh network topology. [2 marks]