Basic Wi-Fi MCQ

1. What is the radio spectrum used by 802.11g?

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2. Which of the following devices is used to decrease the strength of the RF signal intentionally?

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3. Which of the following are major WLAN security standards?

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4. What is the maximum dwell time that can be set for FHSS systems according to FCC specification?

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5. What is the maximum speed of IEEE 802.11g?

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6. What is the full form of Wi-Fi?

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7. Which of the following Service Sets in the infrastructure mode uses a single AP to create the wireless LAN?

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8. What is the radio spectrum used by 802.11a?

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9. Which of the following allows roaming and a larger coverage area?

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10. Which type of modulation is used by 802.11 products when they transmit data using FHSS?

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11. Which of the following calculations measures the WLAN signal as compared to the undesirable signals in the same space?

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12. What is the standard hopping rate (per second) for HomeRF?

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13. Which of the following spread spectrum technologies is more likely to be affected by narrow band interference?

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14. What is the maximum speed of data transfer that can be achieved by 802.11n?

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15. Which type of antennas are best suited for indoor environments such as university campuses?

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16. Which of the following types of WLAN client devices can you install on your desktop?

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17. The reflection of the main RF signal caused by many objects in the transmission is known as

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18.

State whether true or false.

Ad hoc mode cannot be used in a Basic Service Set.

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19. Which of the following are types of RF connectors?

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20. Which of the following types of tools can be used to reduce attacks on a WLAN?

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21. Which of the following types of links can you create when you create site-to-site links?

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22. What is the maximum number of APs supported by DSSS systems in a co-located environment?

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23. Which of the following is used to provide intentional passive gain in wireless networks that are using RF signals?

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24. Which of the following is/are the category/ categories of encoding for WLAN?

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25. What is the maximum obstruction allowable in the Fresnel zone?

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26. Which of the following are the primary roles that WLANs play in today

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27. In radio links, the bulge of the earth needs to be considered only when the distance between two locations is more than ______.

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28. Which type of Ethernet cable is used to connect a WLAN AP with a LAN switch?

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29. Which one of the following WEP authentication methods specified by IEEE 802.11 standard is simpler and more secure?

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30. Which of the following can be used in the AAA security services?

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31. Which of the following statements is/are true when an access point is operating in the DCF mode?

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32. Which of the following classes of encoding for WLAN is used by 802.11a and 802.11g?

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33. Which of the following is/are true of SSID?

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34. What is the full form of WPA?

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35. Which of the following things can interfere with the 802.1b compliant Access Point?

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36. Which of the following types of antennas is ideal for long distance and point-to-point wireless links?

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37. Which of the following regulates the power output levels of radio frequency devices that use the license-free bands?

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38. What is the duration/ID value (in microseconds) if the data frame is a multicast address?

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39. What are Wi-Fi standard and its variations collectively known as?

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40. What is the full form of SSID?

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41. Which of the following encryption methods are used in Wi-Fi?

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42. Which of the following is the correct sequence of 4 way handshake?

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43. Which of the following formulas can be used to calculate the wavelength in meters when the frequency is known where 'w' is the wavelength to be calculated and 'f' is the frequency in hertz?

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44. What are the other names for the Wi-Fi broadcast device?

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45. What is the full form of WEP?

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46. Which of the following is used by DSSS and FHSS for time synchronization and channel information?

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47. Which of the following frequency bands is specified for indoor-only usage?

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48. What is the full form of BSA?

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49. What is the full form of IEEE?

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50.

Which of the following is a more secure method for data transfer using encryption techniques?

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51. In which mode wireless devices cannot communicate directly with each other instead they use AP to forward frames to each other?

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52. In which mode does one wireless device communicate with another wireless device directly without using AP?

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53. How many U-NII license-free bands exist in the 5 GHz frequency range?

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54. A decrease in RF signal strength is known as _____.

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55.

State whether true or false .

The WLAN devices can send data successfully if the SNR is low.

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56. How many power modes are specified for 802.11b standard?

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57. How many non-overlapping channels does IEEE 802.11a standard support?

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58. At which layer of the OSI model do most of the wireless APs operate?

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59. How many hertz is one Gigahertz (GHz) equal to?

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60. Which of the following modulation is used by Wifi?

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61. Quality of Service (QoS) capabilities are incorporated in Wifi with the adoption of:

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62. What is the fixed bandwidth defined by Wifi standard for 802.11b?

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63. IEEE 802.11 includes the specifications for WLAN technologies that make use of radio waves and what other kind of electromagnetic radiation?

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64. Which of the following keys is commonly used on wireless computer networks to increase their security?

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65. What is the fixed bandwidth defined by Wifi standard for 802.11g?

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66. Which of the following frequencies would have the greatest penetration of potential sources of interferences such as walls or trees?

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67. Which of the following is not an organization that influences the standards used for WLANs today?

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68. What is the name of a newer trend in which large mesh networks of wifi are provided over a large geographical area?

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69. What does EIRP stand for?

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70. Wimax works on radio band:

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71. Wifi does not support roaming? True or False

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72. Which of the following is not an unlicensed ISM band?

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73. Which of the following is not a common modulation method used in wireless communication?

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74. An 802.11 frame may contain up to how many address fields?

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75. Which of the following is not one of the three main tools used to decrease the security risks that accompany a WLAN?

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76. Which of the following is not a feature WPA2 security?

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77. What is the name given to individuals who search for unsecure networks in the hope of gaining free access to the internet?

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78. What is it called when some drives around looking for available provate access points?

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79. The 2.4-GHz band is broken down into how many channels?

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80. A wireless network card operates at roughly what rate of power?

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81. A typical off-the-shelf router (made by Netgear, Linksys, etc.) transmits with a power of roughly how many milliwatts?

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82. IEEE's 802.11 provides specifications for which two facets of WLAN communication?

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83. Which of the following refers to unauthorized tapping into another's wifi connection with a public utility?

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84. True or False? A WPAN will generally have a larger area of coverage than a WLAN.

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85. Which of the following would an outdoor WLAN most likely require?

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86. Which of the following security systems was marked as "deprecated," and therefore a security risk, in 2004?

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87. A decibel (dB) is a ratio determined by what two power quantities?

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88. One technique used in attempts to crack a cipher or authentification mechanism is to try hundreds, maybe millions of possible passwords or phrases. What is this technique called?

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89. IEEE 802.11 wireless LAN use a media access control protocol called:

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90. If a device that is rated at 40 milliwatts (mW) is added to a connector whose resistance reduces the power by 3 decibels (-3dB), what is most likely to be the device's power rating?

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91. IEEE 802.1X security protocol uses which three components?

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92. What do the letters DSSS stand for?

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93. IEEE 802.11i is also referred to as:

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94. Of the following choices, which 802.11 offers the highest potential speeds?

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95. The strength of a Wi-Fi wireless radio signal is measured using what standard unit?

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96. Antenna gain is characterized by what unit of measurement?

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97. Which of the following is not one of the layers of the OSI networking model?

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98. What is the unique identifier tied to your wireless or wired ethernet card called?

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99. Which of the following can be effectively used to restrict unnecessary traffic on your wireless network?

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100. Wireless keys are:

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101. Wireless networks can operate on one of which two modes?

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102. What do you call the name of a network that is broadcast by a router?

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103. The diameter of a hotspot area is about:

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104. Some wireless routers provide QoS to help prioritize traffic. What does QoS stand for?

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105. Which one is the most secure?

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106. What does DNS stand for?

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107. Which of the following allows your computer to send and receive wireless signals to and from the internet?

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108. The wavelength of an electromagnetic signal is inversely proportional to what other feature of that signal?

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109. When trying to connect to a wireless network, at times it's name is hidden. What is the technical term for this wireless name?

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110. Which of the following ISM bands is likely to be the most heavily populated?

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111. The radio waves of a WLAN are generated by which device?

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112. What is the most basic difference between a WLAN and an Ethernet LAN?

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113. An IPaddress gets assigned to a computer by a wireless router. what performs this?

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114. The Wired Equivalent Privacy (WEP) security algorithm was first introduced in 1997 by what professional association?

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115. True or false? Wimax offers larger coverage areas with greater bandwidth and speeds compared to wifi.

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116. WPA2 increased the security of WPA from 128 bits to how many bits?

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117. When you connect to a wireless network, you are assigned an IP address. What is an IP address?

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118. Which of the following can redirect an Internet signal to multiple end users?

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119. By using this type of wireless connection, you computer is secure from prying eyes:

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120. What does AP stand for?

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121. What is the term assocaited with DHCP that allows your computer to acces other computers outside your network?

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122. Wifi is used to connect devices to:

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123. A specific location in which an end user can access the Internet wirelessly:

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124. True or False? The more users that share an access point, the slower a wireless network can become.

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125. What does the term WLAN refer to?

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126. Which frequencies does Wifi use to transmit data?

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127. Which of the following devices would definitely not use WiFi?

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128. Which of the following may cause transmission interference with a wireless sign?

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129. What does the W in WLAN stand for?

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130. Wifi works on radio band:

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131. In many cases municipal wifi networks are being created with a combination of:

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132. IEEE 802.11af allows WLAN operation within what two ITU-designated radio wave frequency ranges?

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133. The most common way to secure a wireless connection is to use:

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