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.

Based on the article and the following list of answers, write a list of questions.

1. personal computers
2. video-game consoles
3. phones and tablets
4. an access point
5. yes
6. false
7. unknown
8. many square kilometres
9. no
10. microwave ovens
11. U.S. Federal Communications Commission
12. 1985
13. Ethernet
14. IEEE 802.11
15. the Hawaiian Islands
16. 1971
17. UHF wireless packet
18. twisted pair.
19. true
20. it has no physical connections
1. What is one electronic device that can use Wi-Fi?
2. And another?
3. And one more?
4. What is a hotspot?
5. Is this the only thing a device needs to get wireless internet?
6. True or False: A hotspot can cover a wider area indoors than outdoors.
7. How small can a hotspot be?
8. How big can hotspot coverage be if multiple points are used?
9. Do you need a license to use the ISM band?
10. What kitchen device uses the same band?
11. What body decided to release the band for unlicensed use?
12. When?
13. What was ALOHAnet an ancestor of?
14. What kind of protocol did the ALOHA protocol give rise to?
15. What area did ALOHAnet serve?
16. When?
17. What kind of network did it provide?
18. What is a type of wired connections?
19. True or False: Twisted pair is more secure against attacks than Wi-Fi.
20. Why is Wi-Fi less secure?