A small network of devices that are close together, exchanging data using Bluetooth or Wi-Fi
Which term describes using a device that has a mobile data connection to share that connection with another device, such as a phone sharing its data with a laptop?
Tethering
What is meant by open Wi-Fi?
A wireless connection in a public place that anyone can join, often without a password
What is meant by a blackspot?
A place where a wireless signal cannot reach, often because hills, valleys or buildings block it
What is the name for an attack in which someone on the same network secretly intercepts the data that two devices are sending to each other?
Man-in-the-middle attack
Which term describes nearby devices disrupting a wireless connection because their signals cross with it?
Interference
What is an ad hoc network?
A network set up between devices when it is needed
A surveyor is working in a remote field where there is no Wi-Fi. She needs to send a file from her laptop to the office server. How can she get her laptop online through her smartphone?
Tether the laptop to the smartphone's personal hotspot
Two colleagues pair their devices with a PIN to share files. When one walks to another floor the transfer stops. Why?
The paired devices are now out of range of each other
Why is data sent over an open Wi-Fi network insecure?
It may not be encrypted, so it can be read by others
A hacker on the same open Wi-Fi network installs malware on a user's tablet. What is a likely result?
The data on the tablet could be corrupted or damaged
Six staff share one phone's hotspot to upload files at the same time. The uploads become very slow. Why is this?
The data connection is shared between all six devices
Why do telecom companies build fewer network masts in rural areas than in cities?
There are fewer customers, so there is less investment
A charity works in a developing country where staff often cannot connect to the internet on their phones and the connections they do get are slow. Which is the most likely explanation?
There has been less investment in network infrastructure
A community centre shares one broadband connection. In the evenings, several members stream video at the same time and everyone finds the connection slow. Why is this?
Streaming video uses a large amount of the network bandwidth
A film crew needs to send footage from a temporary site where there is no installed network. Why is an ad hoc network suitable for this?
It can be set up quickly in any location
A warehouse worker uses a hand-held device on an ad hoc network. As he moves around the aisles the connection keeps dropping and returning. Which performance issue is this?
The signal is poor and intermittent
A member of staff connects her laptop to the personal hotspot on her phone so she can reach the company's cloud storage. How does the laptop reach the internet?
The phone shares its mobile data connection with the laptop
A sales rep uses her phone's mobile data while travelling by train. Her connection keeps dropping and she cannot upload her orders. Which is the most likely reason?
The route passes through areas with no mobile coverage
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