YES, it stands for “WIRELESS FIDELITY”

Wi-fi / 802.11,• RADIO WAVES -> WIRELESS NETWORK CONNECTIVITY

W H AT C R E AT E S T H O S E R A D I O W AV E S ? ?• T H E W I R E L E SS A D A P T E R . I T

C R E AT E S A ” H O T S P O T ”

Variants in WIFITYPES FREQUENCY SPEED(max) Orthogonal

Frequency-Division Multiplexing (OFDM)

WIFI a / 802.11a 5 GHz 54 Mb/s YES

WIFI b / 802.11b 2.4 GHz 11 Mb/s NO

WIFI g / 802.11g 2.4 GHz 54 Mb/s YES

WIFI n / 802.11n 5 GHz 140 Mb/s NO

THE INTERNET SPEED AT NASA IS 91 Gb/s MAKING IT 2,000 TIMES FASTER THAN THE AVERAGE HOUSEHOLD CONNECTION SPEED.

NOW, ON TO OUR MAIN DISH,

BEFORE WE START,

R E M E M B E R T H E W O R L D S FA S T E S T W I F I S P E E D ? W E K N O W T H A T I T I S A R O U N D 1 0 0 G b / s .

WELL, LIFI WILL MAKE IT LOOK LIKE A DIAL UP CONNECTION.

L I F I B O A S T S A S P E E D O F 2 2 5 G B / S .

Light Fidelity or Li-Fi is a Visible Light Communications (VLC) system running wireless communications travelling at very high speeds. Li-Fi uses common household LED to enable data transfer.

HOW?

HARALD HAAS

LIFI VS WIFI

WHERE CAN LIFI BE APPLIED?