1.4 - Connectivity Flashcards
Why use Copper Cables?
Transport electricity more efficiently.
Resistant to corrosion and high thermal resistance.
What are the characteristics of Copper Cables?
Limited bandwidth - cannot transmit much data.
Less expensive when connecting to network devices and high attenuation.
What is a key feature of Fibre Cables?
Very fast wired internet connection.
What are the characteristics of Fibre Optic Cables?
Expensive.
Faster transmission than copper, high bandwidth - more data, and less attenuation / signal loss.
What are some Wireless Technologies?
Bluetooth, infrared, microwave, laser, satellite, GSM/5G.
What are the characteristics of Wireless Technology?
Signals degrade with distance.
Infrastructure does not cover all remote areas.
What is Bluetooth?
Short range communication - 10 metres.
What is Infrared?
Device needs to be in line of sight.
Short distance - remote.
What is Microwave technology?
Used with microwave towers.
Sends signals across large areas / large amounts of data but is affected by bad weather - high attenuation.
What is Laser technology?
Transmits data up to 2km as long as there is no barrier, needs to be in line of sight.
Bad weather severely affects transmission.
What is Satellite communication?
Point to multipoint communication (channel is shared among multiple devices/nodes).
Large distance between communication device and satellite causes delay in transmission.
What is GSM / 5G?
Connect to a network for network calls.
Supports messages/voice calls, good compatibility with other devices, but has insufficient coverage in some areas - unstable communication and security protection isn’t that strong.