Transferring Data

Throughput

current amount of data that can be sent through a cable or space (bits, kilobits, megabits, gigabits, terabits). One data packet arrives within one second

Bandwidth

maximum amount of data that can be sent through a cable or space. Multiple data packets arrive within one second

How is data transfer measured?

1000 bits (bps) in a kilobit (kbps), and so on (mbps, gbps, tbps)

RJ-11 Jacks

associated with phone lines and four wires (Plain Old Telephone System (POTS)), commonly found in house phones and modems

RJ-45 Connectors

associated with standard ethernet cables with 8 wires, commonly found in routers, switches, NICs

What technologies allow for wireless networking?

Bluetooth and near field communication (NFC)

PAN (Personal Area Network)

Collection of interconnected devices taking up, at most, a room’s length

Bluetooth

standard for short-range wireless interconnection of devices with a range of 30 ft or 10 meters

Near Field Communications

standard for exchanging data between devices, usually for a maximum of 6 inches away

Reasons to Disable Bluetooth

Drains battery, cyberattacks (bluejacking & bluesnarfing)

Bluejacking

unwanted messages or files sent over Bluetooth

Bluesnarfing

stealing of data over bluetooth