Star & Mesh Network Topologies
Computer Science: OCR GCSE, topic 1.3.16
Star Topology
In the star topology, all the devices are connected to a central server or switch. These networks are very common in local area networks.
Simultaneous access
- The star topology is beneficial as it means that lots of devices can access the server at the same time.
Reliability
- If a single client fails, then all other clients can continue as usual.
- But, the whole network will be affected if the server fails.
Scalable
- The network can easily be scaled up by adding more devices.
Expensive
- It can be expensive to run a cable to every single device in a wired star.
- Wireless star networks can sometimes be more cost effective.
Mesh Topology
In the mesh topology, each computer is connected to every other computer on the network.
Decentralised
- In the mesh topology, there is no central server.
- There is no single point at which the network can fail.
High cost
- A wired mesh is very expensive to construct.
- For example, even a mesh with 10 computers will need at least 45 cables.
- Using wireless technology helps to lessen this cost.
Full mesh vs partial mesh
- Each device in a full mesh topology is connected to every other device in the network.
- In a partial mesh, not all devices are fully connected.
Test yourself on Star & Mesh Network Topologies
What happens if the central switch or server fails in a star topology?
Toggle until all are correct: Which statements about star networks are true?
Where might we often see a star topology?
What impact does the lack of a central server have on a mesh network's reliability?
Which of the following statements about mesh networks are true?