Network Topologies (AQA GCSE Computer Science): Flashcards
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Network topology
Network topology
How devices in a computer network are arranged and connected
Node (in networking)
Node (in networking)
Any device that connects to a network
Two main topology types for GCSE
Two main topology types for GCSE
Star topology and bus topology
Star topology structure
Star topology structure
Each device connects individually to a central switch/hub
Star topology: communication path
Star topology: communication path
All communication goes through the central node
Star topology: single point of failure
Star topology: single point of failure
If central switch fails, entire network stops working
Star topology: if one device fails
Star topology: if one device fails
Rest of network continues working normally
Bus topology structure
Bus topology structure
All devices connect to a single main cable (backbone)
Terminators in bus network
Terminators in bus network
Devices at both ends to prevent signal reflection
Bus topology: devices transmitting data
Bus topology: devices transmitting data
Only one device can successfully send data at a time
Data collision
Data collision
When two data packets are transmitted at the same time
Switch/Hub in star network
Switch/Hub in star network
Central device that connects devices and forwards data
Backbone (in bus network)
Backbone (in bus network)
The main cable that all devices connect to
MAC address
MAC address
Unique identifier for each network device
Bus topology security weakness
Bus topology security weakness
All data travels to every device, easier to intercept