Computer Hardware and Networking MCQ Quiz Hub

1. Wireless networking, or Wi-Fi, can be used to connect computers in a home, and many cities are using the technology to offer free or low-cost Internet access to residents. What’s another name for Wi-Fi?
801.12 networking
801.22 networking
802.11 networking
None of the above

2. A wireless network uses ___ waves to transmit signals.
mechanical
radio
sound
None of These

3. What device sends and receives radio signals in a wireless network?
modem
digital translator
router
None of these

4. At what frequencies do Wi-Fi radios make transmissions?
3 GHz or 8 GHz
2.4 GHz or 5 GHz
2 GHz or 7.3 GHz
None of the above

5. _____ Of the following networking standards, which is not used in Wi-Fi data transmissions?
802.11g
802.11q
802.11b
None of the above

6. Which networking standard is the slowest and least expensive?
802.11a
802.11b
802.11n
None of the above

7. Which networking standard was the first to use orthogonal frequency-division multiplexing (OFDM) as a coding technique?
802.11g
802.11a
802.11n
None of the above

8. Which short-range wireless standard is used for Wireless Personal Area Networks (WPANs)?
802.16
802.15
802.13

9. Which short-range wireless standard is used for Wireless Personal Area Networks (WPANs)?
802.16
802.15
802.13
None of These

10. You can change the settings on your wireless router through a Web interface. One option you can change is the channel. What channel do routers use by default?
2
7
6
None of these

11. Which Operates in the 2.4-GHz Industrial, Scientific and Measurement (ISM) band (2.4 GHz to 2.4835 GHz) and provides signaling rates of up to 11Mbit/sec.
802.11a
802.11b
802.11e
802.11g

12. Which is expected to be ratified sometime in 2005, this Radio Resource Management standard will provide measurement information for access points and switches to make WLANs run more efficiently.
802.11a
802.11b
802.11e
802.11k

13. Which Wi-Fi security is impossible to crack?
WEP
WPA
MAC Filtering
None of the above

14. What should you do to keep unauthorized users from changing your home router settings?
Change the firewall settings on your computer
Change the default administrator password and SSID
Change the MAC address of the router
Nothing, only the administrator can change router settings

15. What are the two components necessary to have a wireless network?
A laptop and the internet
An access point and a WNIC
A router and an internet connection
A dual layer DVD reader and a LAN

16. What channel is the default for commercially sold routers? A. Channel 5 B. Channel 6
Channel 5
Channel 6
Channel 7
Channel 2

17. Which of the following is a sign that you might be on an unsafe network?
. The connection requires you to sign up for an account ove
There is no password needed to access the internet
You get free access with every fifth frappe
None of the above

18. Why is WEP security not as strong as WPA or WPA2 even though the code key is longer?
WPA uses tunneling protocols
WEP sends authentication codes with each packet
WEP lacks the ability to use special characters
WEP is not compatible with Windows 7 or Mac OS

19. Which wireless protocol uses TKIP?
WEP
WPA
WPA2
WPS

20. What is an Evil Twin Attack?
An attack that mimics your MAC address to enter your network
An attack that denies service to your router
An attack that creates a mock website to trick a user into divulging secure information
An attack that copies all of the files from your router to a secondary hard drive on a hacker computer and then harvests information continuously on your browsing activity

21. wifi stands for_________
Wireless Fidelity
Wireless functioning
Wireless function
None of the above

22. A Wi-fi enabled device can be_____
PC
Game Console
Mobile phone
All of the above

23. Wifi uses which kind of multiplexing?
OFDM
TDM
WDM
FDM

24. Wifi Alliance for certified products based on the
IEEE 802.3
IEEE 802.5
IEEE 802.11
None of the above

25. What is the “acceptable” limit for the attenuation of a wifi signal (threshold before breaking signal)
75 dB
20 db
-75 DB
– 75 GHz

26. How many channels have 2.4 GHz frequency?
8
10
13
16

27. The signal/noise ratio or SNR:
It is a calculation that determines who makes the most noise in the Office 4001
This is what means the quality of the transmission of information in relation to parasites
This is a signal that sends noise in a building
None of the above