Digital communication 2 Flashcards
How is a network created?
When two or more computers are connected.
What is a LAN
A network that connects digital devices that are in a small geographical area, like a building or a group of buildings that are close to each other.
Where are LAN’s found in?
Homes, schools, and office buildings.
What are WAN’s used for?
To connect devices across a large geographical area.
What are the two ways WANS are provided connectivity for?
Some organizations launch their own satellites to provide connectivity for their global wans.
Other WAN’s choose to rely with a third party telecommunications company to provide them with connectivity, often linking LAN’s together through the internet.
Why do WAN’s often have lower transfer speeds than LAN’s?
Because of their wider reach.
Why do WAN’s often have lower transfer speeds than LAN’s?
Because of their wider reach.
What is a PAN?
Group of connected devices that are all near and individual user form a PAN.
What are the two ways devices in a PAN can be connected to each other?
They can be connected directly.
They can be connected through an access point.
What is a WPAN
A PAN that only uses wireless connectivity.
What is a WPAN
A PAN that only uses wireless connectivity.
Tethering
Connecting a host device that uses a mobile broadband connection to with other devices so that they can use the host’s broadband connection
Mobile phone network providers can enable or disable tethering as part of the…..
Service agreement
Hotspot is available on any host device and is installed for free on the device- why is this statement wrong?
Mobile network providers can enable or disable tethering as part of the service agreement.
Some network providers charge more for this feature to be enabled
Define service agreement
Contract
What are the two main uses of wired and wireless methods to transfer data?
Networking and connecting peripherals.
In terms of technology used how are wired and wireless methods different from each other.
Wired methods use electric signals.
Wireless methods use radio waves.
In terms of technology used how are satellites and broadcasting similar.
They both uses radio waves.
What are the 4 uses of satellites
GPS, military, television, telephone
What are the two uses of broadcasting?
Tv shows, radio shows.
What are satellites used for?
To transmit data to and receive data from digital devices.
Why do some digital devices have antennae?
To receive the radio signals that satellites transmit.
What the two benefits of satellite communication?
The number of satellites orbiting across the planet means that the system is always available.
It also cannot be affected by power shortages.
What are two draw backs of satellite communication?
Satellite signals do not pass through solid objects and wont work in areas like tunnels.
Can be affected by atmospheric weather conditions such as heavy rain or snow.
