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Level 13

Networking


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Two or more computers connected together so that they can send and receive data
What is a computer network?
You can share resources like storage space or peripherals
What is the main advantage of using a computer network?
It is more expensive and less secure than using individual computers
What disadvantages are there to using a computer network?
Each computer is connected to a shared cable
How does the bus topology work?
Small networks
Does the bus topology work better for small networks or big networks?
It's easy to connect a new computer and it doesn't require as much cable as the star or ring topologies
What are the advantages of using the bus topology?
The whole network breaks if there's a problem with the main cable
Why is the bus topology not very resilient?
Data is shared between all computers
Why might the bus topology be less secure than other topologies?
There is more chance of data collisions
Why might the bus topology be slower than other topologies?
Each computer is connected to the computers on either side of it, creating a ring
How does the ring topology work?
There's no need for a server like in the star topology, there is less chance of data collisions and it's easy to connect a new computer
What are the advantages of the ring topology?
If one computer doesn't work or there's a problem with the connection between any two computers, the whole network breaks
Why is the ring topology not very resilient?
Data has to travel through each computer
Why is the ring topology slower than the bus topology?
Each computer is connected to a central server, forming a star shape
How does the star topology work?
It needs a central server which is more expensive
What is the disadvantage of the star topology?
If one cable breaks, most of the network carry on working
Why is the star topology resilient?
A computer trying to access a website or service
What is a client?
Although most clients will want to use the service properly, some of them may be hackers
Why are clients not trusted?
One computer that waits for requests from clients and gives them information
What is a server?