WorksheetsGCSE COMPUTER SCIENCE NETWORKS (L1-2)
Total questions: 40
Worksheet time: 23mins
What can happen on a busy network with lots of traffic?
Data collisions
Faster data transmission
Lower latency
Increased bandwidth
Which network covers a large geographical area?
LAN
WAN
Which is the best definition of a network?
Lots of interconnected computers
Two or more computers connected together
computers which can connect to the internet
the Internet
What is a stand-alone computer?
a computer that is connected to a network
a computer that is not connected to a network
A computer that is not next to another computer eg a smartphone
The best quality and performing computer available
What is a data collision?
When two devices on a network transmit data at the same time
When one device on a network transmits data
When two devices on a network transmit at separate times
Which one is a STAR topology
A star topology will cause a network failure if...
If the hub/switch fails
If one of the many of the computers fail
If the printer fails
A BUS topology is (Which one is correct)?
Easy to set up
Expensive to set up
Hard to set up
Networked computers can share (select which one is true)
Hardware, software and data
Optical discs, software and data
Hardware, software and Clients
Each node is connected to every other node.
Partially-connected mesh topology
Mesh topology
Fully-connected mesh topology
Semi-connected mesh topology
Why are partially-connected mesh topologies used?
They are more effective.
They are faster.
They are cheaper.
They are more useful.
Which of these is an advantage of mesh topologies?
They allow you to communicate over long distances.
They make the computer run faster.
They are easy to build.
Many devices can transmit data simultaneously.
Which of these does a mesh topology have?
Server
Switch
Hub
None of the above
Each node is connected to every other node.
Partially-connected mesh topology
Mesh topology
Fully-connected mesh topology
Semi-connected mesh topology
Which of these was the original application of mesh topology?
Street lights
Military
Gaming
Smart meters
Which of these is the equation for the number of connections in a fully-connected mesh network
2n(n−1)
n(n+2)
2n(n−1)
n−1
Why are partially-connected mesh topologies used?
They are more effective.
They are faster.
They are cheaper.
They are more useful.
Which of these is an advantage of mesh topologies?
They allow you to communicate over long distances.
They make the computer run faster.
They are easy to build.
Many devices can transmit data simultaneously.
Which of these are disadvantages of mesh topology?
They are slower.
The cost of building the network is higher.
They are only compatible with certain computers.
The network requires more maintenance.
Why does the military use mesh topologies?
They use less energy.
They are faster.
To avoid breakdowns in communications.
They are cheaper.
Why are messages sent over a mesh topology received more quickly?
The route to the intended recipient is shorter, as it does not need to go through a central connection point.
The wires used for them can transmit more data.
They use less energy.
They use more energy.
What is the world's largest mesh network?
ARPANET
The Internet
The World Wide Web
Google Chrome
Why does the military use mesh topologies?
They use less energy.
They are faster.
To avoid breakdowns in communications.
They are cheaper.
Which of these was the original application of mesh topology?
Street lights
Military
Gaming
Smart meters
Why are messages sent over a mesh topology received more quickly?
The route to the intended recipient is shorter, as it does not need to go through a central connection point.
The wires used for them can transmit more data.
They use less energy.
They use more energy.
What is not a benefit of networking?
Share hardware
Share software
Share viruses
Share workstations
Which network topology needs a switch or hub?
Mesh
Partial Mesh
Star
Bus
Advantages of a bus network
One-way system so not affected by heavy traffic
Fastest performance
Failure of one node does not affect the rest of the bus network
A failure in the minor cables will only affect one node
Disadvantages of a bus network:
If the main bus cable fails then the whole network will fail
An extra hub or switch further increases the cost
Cable failure anywhere will affect the whole network
Performance of the network slows down rapidly with more nodes or heavy network traffic
Advantages of a star network
One-way system so not affected by heavy traffic
Fastest performance
Easy to install and to expand with extra nodes
A failure in the minor cables will only affect one node
Disadvantages of a star network
Uses the most cable which makes it more expensive
An extra hub or switch further increases the cost
Cable failure anywhere will affect the whole network
Need to ‘break’ the network in order to add a new node
