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01 - Introduction to WIFI

 1. What is Wi-Fi?
The famous actress in the picture is Hedy Lamarr.
Hedy Lamarr and WIFI? There's an interesting link
that those of you who are interested may want to
research more about.
hedylemmar_wifi.jpg

  Radio wireless local area networking

  Data transmitted via radio in Morse code

  A USB stick containing the Internet

  Infrared pulsed networking

 2. What is the international technical standard for Wi-Fi?

  IEEE 802.11

  ICR 300.5

  ICHEME 500.44

  ICE 700.1

 3. The word 'Wi-Fi' was invented for marketing purposes to sound like 'hi-fi'.

  FALSE

  TRUE

 4. Wi-Fi connects two or more devices using …

  wireless communication

  fibre optic cable

  sonar technology

  infrared pulses

 5. Wi-Fi uses UHF and SHF radio bands. What do these abbreviations stand for?

  ultimate high frequency and superlative high frequency

  ultra heavy frequency and super heavy frequency

  under high frequency and sub high frequency

  ultra high frequency and super high frequency

 6. To connect to a Wi-Fi network, a device must have a …

  wireless network adapter

  graphics card

  USB port

  Ethernet port

 7. The device can then connect to a …

  cellular phone mast

  network gate

  Wi-Fi enabler

  wireless access point

 8. To reduce interference, Wi-Fi networks 'listen' to avoid sending data at the same time as another transmitter.

  TRUE

  FALSE

 9. Which of these options are advantages of Wi-Fi?
1. It is always free to use.
2. Users do not have to connect to the network using a cable.
3. Multiple users can connect to the network.
4. The Internet can be accessed on the go.
5. It is always at least a 100 times faster than any wired connection. 
6. It is more secure than a wired connection.
wifihotspot.jpg

  1, 2, 3, 4 and 5

  1, 2, 3, and 6

  2, 3, and 4

  All of these options

 10. Which of these options are disadvantages of Wi-Fi?
1. The operational range is limited.
2. The signal will be affected by physical obstacles (e.g. walls). 
3. Other equipment sharing the same frequency band (e.g. microwave ovens) can cause interference.
4. It is generally slower than a wired connection. 
5. It is vulnerable to unauthorised access and attacks.
6. The data transfer rate decreases as the number of computers connected increases. 

  2, 3, 4 and 5

  All of these options

  1, 2, 3 and 6

  1, 2, 3, 4 and 5