Wi-Fi or WiFi () is a technology for wireless local area networking with devices based on the IEEE 802.11 standards. "Wi-Fi" is a trademark of the Wi-Fi Alliance, which restricts the use of the term "Wi-Fi Certified" to products that successfully complete interoperability certification testing. 

Devices that can use Wi-Fi technology include personal computers, video-game consoles, phones and tablets, digital cameras, smart TVs, digital audio players and modern printers. Wi-Fi compatible devices can connect to the Internet via a WLAN and a wireless access point. Such an access point (or hotspot) has a range of about indoors and a greater range outdoors. Hotspot coverage can be as small as a single room with walls that block radio waves, or as large as many square kilometres achieved by using multiple overlapping access points. 

Wi-Fi most commonly uses the UHF and SHF ISM radio bands. Having no physical connections, it is more vulnerable to attack than wired connections, such as twisted pair. 

In 1971, ALOHAnet connected the Hawaiian Islands with a UHF wireless packet network. ALOHAnet and the ALOHA protocol were early forerunners to Ethernet, and later the IEEE 802.11 protocols, respectively. 

A 1985 ruling by the U.S. Federal Communications Commission released the ISM band for unlicensed use. These frequency bands are the same ones used by equipment such as microwave ovens and are subject to interference.
What is one electronic device that can use Wi-Fi?
And another?
And one more?
What is a hotspot?
Is this the only thing a device needs to get wireless internet?
True or False: A hotspot can cover a wider area indoors than outdoors.
How small can a hotspot be?
How big can hotspot coverage be if multiple points are used?
Do you need a license to use the ISM band?
What kitchen device uses the same band?
What body decided to release the band for unlicensed use?
When?
What was ALOHAnet an ancestor of?
What kind of protocol did the ALOHA protocol give rise to?
What area did ALOHAnet serve?
When?
What kind of network did it provide?
What is a type of wired connections?
True or False: Twisted pair is more secure against attacks than Wi-Fi.
Why is Wi-Fi less secure?
personal computers
Devices that can use Wi-Fi technology include personal computers, video-game consoles, phones and tablets, digital cameras
video-game consoles
Devices that can use Wi-Fi technology include personal computers, video-game consoles
phones and tablets
Devices that can use Wi-Fi technology include personal computers, video-game consoles, phones and tablets
an access point
 Such an access point (or hotspot)
yes
Wi-Fi compatible devices can connect to the Internet via a WLAN and a wireless access point.
false
has a range of about indoors and a greater range outdoors.
unknown
unknown
many square kilometres
Hotspot coverage can be as small as a single room with walls that block radio waves, or as large as many square kilometres achieved by using multiple overlapping access points. 
no
A 1985 ruling by the U.S. Federal Communications Commission released the ISM band for unlicensed use
microwave ovens
These frequency bands are the same ones used by equipment such as microwave ovens
U.S. Federal Communications Commission
A 1985 ruling by the U.S. Federal Communications Commission released the ISM band for unlicensed use.
1985
A 1985 ruling
Ethernet
ALOHAnet and the ALOHA protocol were early forerunners to Ethernet
IEEE 802.11
and later the IEEE 802.11 protocols
the Hawaiian Islands
 ALOHAnet connected the Hawaiian Islands
1971
In 1971, ALOHAnet connected the Hawaiian Islands with a UHF wireless packet network. ALOHAnet and the ALOHA protocol were early forerunners to Ethernet, and later the IEEE 802.11 protocols, respectively. 
UHF wireless packet
with a UHF wireless packet network
twisted pair.
wired connections, such as twisted pair. 
true
Having no physical connections, it is more vulnerable to attack than wired connections, such as twisted pair. 
it has no physical connections
Having no physical connections