Wi-Fi Trivia
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56 free Wi-Fi trivia questions with answers — technology quiz, new questions added Sep 2026.
This Wi-Fi trivia quiz covers the wireless networking standard that quietly took over the world, from a Dutch cash-register project in 1991 to Wi-Fi 7. The easy questions are the ones any laptop owner knows: what the two main radio bands are, which kitchen appliance interferes with your signal, what SSID stands for, why the name is written with a hyphen, and which company first put it in a consumer laptop. From there it moves into the alphabet soup of 802.11 letters, the Wi-Fi Alliance and its yin-yang logo, and how the technology got its name from a branding agency. The hard end covers the disputed history: NCR and AT&T's WaveLAN, Vic Hayes and the IEEE committee, the CSIRO team led by John O'Sullivan and the hundreds of millions of dollars Australia collected in patent settlements, plus the security story from WEP to KRACK to WPA3, the WPS PIN flaw, wardriving, eduroam and Wi-Fi positioning. Hedy Lamarr's frequency-hopping patent gets a question too, with the caveat the record deserves. Every answer was checked against Wikipedia's articles on Wi-Fi, IEEE 802.11, the Wi-Fi Alliance and related topics, and each question links to the page that establishes it. Fifty questions, free, with an explanation after every answer.
30 of 56 questions with answers and explanations. Play the quiz
Q 01What do the curved bars of the Wi-Fi icon on a phone or laptop measure?
Signal strength
Signal strength: the bars show how well your device hears the router, not how fast the link is, so a full set can still come with a crawling connection.
Q 02The two radio bands Wi-Fi most commonly uses are 5 GHz and which other?
2.4 GHz
2.4 GHz: US regulators opened the band to licence-free radio gear in 1985, so any maker could build for it without buying airwaves, and gadgets of every kind have crowded in since.
Q 03Which common kitchen appliance can disrupt nearby Wi-Fi while it is running?
Microwave oven
Microwave oven: it heats food with the same band of waves most Wi-Fi uses, and the oven was there first, since that band was set aside in 1947 for microwave heating.
Q 04Which chip maker's Centrino brand, launched in 2003, put built-in Wi-Fi into millions of laptops?
Intel
Intel: Wi-Fi was far from a standard laptop feature at the time, so Centrino bundled it with the processor and a vast advertising blitz had buyers asking for it by name.
Q 05The name Wi-Fi was partly chosen because it echoes which older consumer term?
Hi-Fi
Hi-Fi: the rhyme was the point, and by one founder's account the name stands for nothing, with the 'Wireless Fidelity' slogan added afterwards to reassure nervous board members.
Q 06What shape is the Wi-Fi Alliance's certification logo?
A yin-yang
A yin-yang: only products that pass the Alliance's interoperability testing may carry it, so buyers can trust gear from different makers to work together.
Q 07Why do devices often join an 'evil twin' hotspot rather than the real network it copies?
Its signal is stronger
Its signal is stronger: attackers sit close to their targets, so the copy outshouts the real hotspot and some devices then join it automatically.
Q 08The NCR team whose wireless networking gear paved the way for Wi-Fi worked in Nieuwegein, in which country?
Netherlands
Netherlands: NCR wanted wireless links for its cash registers, so it asked one of its engineers to start work on an industry-wide wireless standard.
Q 09Why does 5 GHz Wi-Fi usually reach fewer rooms than a router's lower band?
Higher frequencies weaken faster
Higher frequencies weaken faster: walls and floors absorb more of a 5 GHz signal, so for distant rooms the lower band is the better pick.
Q 10Which Australian science agency built a wireless LAN test bed in 1992 and later earned hundreds of millions from Wi-Fi patents?
CSIRO
CSIRO: its team tamed reverberation, radio waves bouncing off indoor surfaces and distorting the signal, which had made fast indoor wireless links so hard to build.
Q 11John O'Sullivan's Australian team adapted a technique for reducing multipath interference that he had originally developed for what field?
Radio astronomy
Radio astronomy: O'Sullivan had used that maths to sharpen radio-telescope images, and the patent it produced now underpins Wi-Fi in phones, laptops and TVs.
Q 12Which video game company was among the firms that paid the Australian science agency in 2009 to settle Wi-Fi patent claims?
Nintendo
Nintendo: it joined HP, Microsoft and Intel in paying over $200 million, and a second wave of claims drew more than $220 million from other firms in 2012.
Q 13Ad hoc Wi-Fi, which needs no router, let nearby friends play each other on which kind of device?
Handheld game consoles
Q 21Which router feature gets a device online but blocks it from your own computers and smart devices?
Guest network
Guest network: it has its own name and password, so visitors never learn your main one, and malware on a friend's phone cannot reach the devices on your own network.
Q 22Which address is built into a Wi-Fi device at the factory rather than set by the network?
MAC
MAC address: because it never changed, networks could use it to follow a phone from place to place, so Apple and Android devices now show each network a different, randomised one.
Q 23Before a Wi-Fi device transmits on a shared channel, what must it do first?
Check the airwaves are clear
Handheld game consoles: Sony's PSP had an ad hoc mode that let nearby systems talk straight to each other, so friends in the same room could play together with no router or internet connection.
Q 14What did Apple call the Wi-Fi feature it launched with its iBook laptop in 1999?
AirPort
AirPort: Apple teamed with Lucent to build it, and once the iBook showed laptops could go online without a cable, other computer makers quickly followed.
Q 15What does the 6 in the name Wi-Fi 6 stand for?
Sixth generation
Sixth generation: in 2018 the Wi-Fi Alliance swapped engineering codes for plain numbers so that shoppers could tell at a glance which gear was newer.
Q 16Wi-Fi 6E extends Wi-Fi 6 into which additional frequency band?
6 GHz
6 GHz: US regulators opened the band to Wi-Fi in 2020, giving new devices a wide stretch of fresh airwaves away from the congestion that slows older networks.
Q 17Which tech giant bought the home Wi-Fi router start-up Eero in 2019?
Amazon
Amazon: it said the deal would help customers connect smart-home devices more easily, since owning the router makes its Alexa gadgets simpler to set up.
Q 18Ultra-fast, short-range Wi-Fi that uses the 60 GHz millimetre-wave band is sold under what brand name?
WiGig
WiGig: its signals carry several gigabits a second but cannot get through walls, so it is used for cable-free links within one room, such as laptop docks and virtual-reality headsets.
Q 19By 2025, the fastest Wi-Fi versions at close range could reach roughly what speed?
23 Gbit/s
23 Gbit/s: that is over ten thousand times the speed of the original 1997 standard, yet the following version, Wi-Fi 8, aims for steadier connections rather than a higher peak.
Q 20On a router's label or a phone's Wi-Fi settings, what does the term SSID refer to?
The network's name
The network's name: SSID stands for service set identifier, and although a router can stop broadcasting it, hiding the name is only a minimal security measure that freely available tools defeat.
Check the airwaves are clear: a radio cannot hear a clash while it is sending, so Wi-Fi listens first, then waits a random moment, which is why crowded networks slow down.
Q 24Which is the only country where Wi-Fi may use channel 14, the highest in its lower band?
Japan
Japan: the United States allows 11 channels and Europe 13, and even in Japan channel 14 works only with the oldest, slowest kind of Wi-Fi, so modern devices rarely use it.
Q 25The typical indoor range of a Wi-Fi access point is about how far?
20 metres
20 metres: walls, floors and furniture soak up the signal indoors, which is why the same access point reaches farther in the open air.
Q 26In 2015 Britain's telecoms regulator warned that which Christmas decoration could slow down home Wi-Fi?
Fairy lights
Fairy lights: Ofcom made the festive warning while launching an app to test home Wi-Fi, after finding that connections in six million homes and offices ran slower than they should.
Q 27Wi-Fi's original encryption scheme, which free tools can now crack within minutes, was called what?
WEP
WEP: short for Wired Equivalent Privacy, it promised the privacy of a cable, but flaws in its design soon surfaced and it was officially retired in 2004.
Q 28Public Wi-Fi is now usually safe, say US consumer regulators, because most websites protect your data with what?
HTTPS encryption
HTTPS encryption: the padlock in the address bar means data is scrambled between you and the site, so the old advice to stay off café Wi-Fi is now mostly out of date.
Q 29The 2017 KRACK attack broke which security standard, then protecting nearly every home Wi-Fi network?
WPA2
WPA2: the weakness lay in the standard itself rather than in any one product, so nearly every phone, laptop and router in the world needed a security update.
Q 30In 2010 Google admitted that which of its services had accidentally gathered data from unencrypted home Wi-Fi networks?
Street View
Street View: its camera cars also logged Wi-Fi networks to help phones work out where they were, but a software mistake saved snippets of what was sent over unprotected ones.