MCQs

Disclaimer:

Educational Use Only:

The website links provided are to be used strictly for educational and knowledge-gaining purposes only.

No Misuse:

Do not misuse the links or the information contained therein for any commercial, illegal, or unethical activities.

Respect for Websites and Businesses:

Respect the intellectual property and business interests of the websites and their owners. Do not attempt to alter, copy, or redistribute content without proper authorization.

Acknowledge Value of Knowledge:

Recognize and value the knowledge and resources shared by these websites. Use the information responsibly and ethically.

No Endorsement:

The provision of these links does not imply endorsement of the linked sites, their content, or their products and services. Users are responsible for evaluating the suitability and accuracy of the information.

User Responsibility:

By accessing these links, you agree to use the information at your own risk and to comply with all applicable laws and website terms of use.

1. Which organization developed the 802.11 wireless LAN standards?
   a. ISO
   b. IEEE
   c. ITU
   d. IETF
   Answer: b. IEEEwikipedia
2. What was the maximum data rate offered by the original IEEE 802.11 standard released in 1997?
   a. 54 Mbps
   b. 600 Mbps
   c. 2 Mbps
   d. 11 Mbps
   Answer: c. 2 Mbpstutorialspoint
3. Which frequency band does IEEE 802.11b operate on?
   a. 5 GHz
   b. 2.4 GHz
   c. 60 GHz
   d. 6 GHz
   Answer: b. 2.4 GHztutorialspoint
4. What modulation technique is used in IEEE 802.11a?
   a. DSSS
   b. FHSS
   c. OFDM
   d. MC-OOK
   Answer: c. OFDMtutorialspoint
5. Which of the following wireless standards supports both 2.4 GHz and 5 GHz bands?
   a. 802.11b
   b. 802.11g
   c. 802.11n
   d. 802.11a
   Answer: c. 802.11ngeeksforgeeks+1
6. What is the primary difference between 802.11a and 802.11b?
   a. Frequency band
   b. Channel width
   c. Antenna type
   d. Authentication method
   Answer: a. Frequency bandtutorialspoint
7. What is the maximum theoretical data rate of 802.11g?
   a. 22 Mbps
   b. 54 Mbps
   c. 600 Mbps
   d. 11 Mbps
   Answer: b. 54 Mbpsgeeksforgeeks+1
8. Which IEEE 802.11 standard introduced MIMO (Multiple Input Multiple Output) technology?
   a. 802.11b
   b. 802.11g
   c. 802.11n
   d. 802.11a
   Answer: c. 802.11ntek
9. What is the main advantage of MIMO in wireless communication?
   a. Increased number of channels
   b. Higher modulation rate
   c. Increased data throughput
   d. Reduced frequency usage
   Answer: c. Increased data throughputtek
10. Which standard is referred to as Wi-Fi 5?
    a. 802.11a
    b. 802.11ac
    c. 802.11n
    d. 802.11g
    Answer: b. 802.11acgeeksforgeeks
11. On which frequency band does 802.11ac primarily operate?
    a. 2.4 GHz
    b. 5 GHz
    c. 6 GHz
    d. Sub 1 GHz
    Answer: b. 5 GHztechtarget
12. What is the peak theoretical speed supported by 802.11ac?
    a. 54 Mbps
    b. 1.3 Gbps
    c. 600 Mbps
    d. 11 Mbps
    Answer: b. 1.3 Gbpsgeeksforgeeks+1
13. Which IEEE 802.11 standard is known as Wi-Fi 6?
    a. 802.11n
    b. 802.11ac
    c. 802.11ax
    d. 802.11g
    Answer: c. 802.11axgeeksforgeeks+1
14. What is the main improvement of 802.11ax over 802.11ac?
    a. Only wider channels
    b. More frequency bands supported
    c. Increased device/user capacity and throughput
    d. Change in modulation scheme exclusively
    Answer: c. Increased device/user capacity and throughputgammasolutions
15. 802.11ax supports which frequency bands?
    a. 2.4 GHz only
    b. 5 GHz only
    c. 2.4 and 5 GHz
    d. 6 GHz only
    Answer: c. 2.4 and 5 GHztechtarget+1
16. What protocol was introduced in IEEE 802.11i for improved security?
    a. WEP
    b. WPA2
    c. WPA3
    d. TKIP
    Answer: b. WPA2wikipedia
17. What encryption method does WEP use?
    a. AES
    b. 3DES
    c. RC4
    d. Blowfish
    Answer: c. RC4nxp
18. Which authentication methods are specified in the original 802.11 standard?
    a. EAP & PAP
    b. Open System & Shared Key
    c. RADIUS & TACACS+
    d. Challenge Handshake & OAuth
    Answer: b. Open System & Shared Keystanford+1
19. What is the maximum channel width for 802.11ac?
    a. 20 MHz
    b. 40 MHz
    c. 80 MHz
    d. 160 MHz
    Answer: d. 160 MHztek
20. Which IEEE 802.11 standard operates in TV white space below 1 GHz?
    a. 802.11ad
    b. 802.11ah
    c. 802.11af
    d. 802.11ax
    Answer: c. 802.11afelectronics-notes
21. What is the focus of IEEE 802.11p?
    a. Vehicle-based communication networks
    b. IoT devices
    c. Long-range WiFi
    d. Security enhancements
    Answer: a. Vehicle-based communication networkswikipedia
22. Which standard introduced MU-MIMO (Multi-User MIMO)?
    a. 802.11n
    b. 802.11ac
    c. 802.11g
    d. 802.11a
    Answer: b. 802.11actek
23. What does CSMA/CA in 802.11 refer to?
    a. Collision avoidance mechanism
    b. Channel bandwidth allocation
    c. Content switching protocol
    d. Carrier modulation type
    Answer: a. Collision avoidance mechanismtutorialspoint
24. In which year was the IEEE 802.11n standard published?
    a. 2001
    b. 2003
    c. 2009
    d. 2013
    Answer: c. 2009tek+1
25. What is the main reason for interference faced by 802.11b/g devices?
    a. Low power output
    b. Crowded 2.4 GHz band
    c. Use of OFDM
    d. High data rate
    Answer: b. Crowded 2.4 GHz bandtutorialspoint
26. Which 802.11 amendment deals with extremely high throughput (Wi-Fi 7)?
    a. 802.11ay
    b. 802.11be
    c. 802.11ax
    d. 802.11af
    Answer: b. 802.11betechtarget+1
27. What is the range of frequency bands used by different IEEE 802.11 standards?
    a. 2.4 GHz and 60 GHz only
    b. Below 1 GHz to 60 GHz
    c. Only 5 GHz
    d. 2.4 GHz, 5 GHz, and 6 GHz only
    Answer: b. Below 1 GHz to 60 GHzelectronics-notes
28. Which IEEE standard supports infrared wireless communication?
    a. 802.11ba
    b. 802.11bb
    c. 802.11be
    d. 802.11ay
    Answer: b. 802.11bbwikipedia
29. What is one of the primary goals of Wired Equivalent Privacy (WEP) in 802.11?
    a. End-to-end encryption
    b. Data confidentiality for airborne transmission
    c. Authentication with certificates
    d. Traffic segmentation
    Answer: b. Data confidentiality for airborne transmissionwebstor.srmist
30. Which standard was the first to use OFDM as a modulation technique?
    a. 802.11a
    b. 802.11b
    c. 802.11g
    d. 802.11n
    Answer: a. 802.11atutorialspoint
31. Which feature does 802.11g inherit from 802.11a?
    a. Channel width
    b. Modulation technique
    c. Security protocol
    d. Noise immunity
    Answer: b. Modulation techniquegeeksforgeeks+1
32. What is the maximum data transfer rate for 802.11n?
    a. 54 Mbps
    b. 300 Mbps
    c. 600 Mbps
    d. 1 Gbps
    Answer: c. 600 Mbpstek
33. What technology does 802.11n use to improve range and reliability?
    a. WEP encryption
    b. DSSS access
    c. MIMO antennas
    d. TKIP protocol
    Answer: c. MIMO antennastek
34. Which frequency band is exclusive to the 802.11ad standard?
    a. 2.4 GHz
    b. 5 GHz
    c. 6 GHz
    d. 60 GHz
    Answer: d. 60 GHzelectronics-notes
35. What is the primary channel bandwidth used by 802.11b?
    a. 10 MHz
    b. 20 MHz
    c. 40 MHz
    d. 80 MHz
    Answer: b. 20 MHztutorialspoint
36. 802.11g is backward compatible with which wireless standard?
    a. 802.11a
    b. 802.11b
    c. 802.11n
    d. 802.11ac
    Answer: b. 802.11bgeeksforgeeks+1
37. What security protocol replaced WEP for improved WLAN security?
    a. TKIP
    b. WPA
    c. WPA2
    d. WPA3
    Answer: b. WPAwikipedia
38. Which spread spectrum technique is used by 802.11b?
    a. DSSS
    b. OFDM
    c. FHSS
    d. QAM
    Answer: a. DSSStutorialspoint
39. What type of networking topology is supported by all 802.11 standards?
    a. Star only
    b. Mesh only
    c. Centralised and ad hoc
    d. Bus only
    Answer: c. Centralised and ad hoctutorialspoint
40. The 802.11 family employs which media access technique?
    a. TDMA
    b. FDMA
    c. CSMA/CA
    d. CDMA
    Answer: c. CSMA/CAwikipedia+1
41. What IEEE 802.11 standard is designated for Enhanced Directional MultiGigabit PHY?
    a. 802.11ay
    b. 802.11af
    c. 802.11ax
    d. 802.11ad
    Answer: a. 802.11aywikipedia
42. Which standard defines Wake-up Radio (WUR) for energy-efficient operation?
    a. 802.11bb
    b. 802.11ba
    c. 802.11bz
    d. 802.11ay
    Answer: b. 802.11bawikipedia
43. Which type of authentication does 802.11b security mechanism utilize?
    a. Challenge-response and token-based
    b. Open-system and shared-key
    c. OAuth and RADIUS
    d. Kerberos and SAML
    Answer: b. Open-system and shared-keystanford
44. Which frequency band is most susceptible to interference from microwaves and Bluetooth devices?
    a. 5 GHz
    b. 2.4 GHz
    c. 6 GHz
    d. Sub 1 GHz
    Answer: b. 2.4 GHzgeeksforgeeks+1
45. What channel width is supported by basic 802.11a and b standards?
    a. 5 MHz
    b. 10 MHz
    c. 20 MHz
    d. 80 MHz
    Answer: c. 20 MHzelectronics-notes+1
46. What is the center frequency of channel 1 in the 2.4 GHz band?
    a. 2.401 GHz
    b. 2.412 GHz
    c. 2.424 GHz
    d. 2.438 GHz
    Answer: b. 2.412 GHzelectronics-notes
47. How many channels are defined in the 2.4 GHz band for 802.11b/g?
    a. 7
    b. 11
    c. 14
    d. 4
    Answer: c. 14electronics-notes
48. Which 802.11 standard is aimed at indoor short-range communications using millimeter wave spectrum?
    a. 802.11af
    b. 802.11ay
    c. 802.11ax
    d. 802.11bb
    Answer: b. 802.11aywikipedia
49. What does the IEEE 802.11 protocol family primarily provide for devices?
    a. Wired connectivity
    b. Wireless LAN connectivity
    c. Cellular communication
    d. Satellite communication
    Answer: b. Wireless LAN connectivitywikipedia+1
50. Which enhancement in 802.11ax improves dense environments, like airports and stadiums?
    a. MIMO technology only
    b. Increased modulation order only
    c. Higher average throughput per user
    d. Use of 60 GHz band
    Answer: c. Higher average throughput per usergammasolutions

1. https://en.wikipedia.org/wiki/IEEE_802.11
2. https://www.geeksforgeeks.org/computer-networks/wi-fi-standards-explained/
3. https://www.tutorialspoint.com/data_communication_computer_network/ieee_802_11_wireless_lan_standards.htm
4. https://www.tek.com/en/documents/primer/wi-fi-overview-80211-physical-layer-and-transmitter-measurements
5. https://www.geeksforgeeks.org/computer-networks/wireless-networking-standards-wi-fi-5-802-11ac-vs-wi-fi-6-802-11ax/
6. https://www.techtarget.com/searchnetworking/tip/Whats-the-difference-between-80211ax-vs-80211ac
7. https://www.gammasolutions.com/gamma-chat/802-11ax-wifi-compare-802-11ac/
8. https://community.nxp.com/t5/Wi-Fi-Bluetooth-802-15-4/802-11-Wi-Fi-Security-Concepts/ta-p/1163551
9. https://cs.stanford.edu/people/eroberts/courses/soco/projects/2003-04/wireless-computing/sec_80211.shtml
10. https://www.electronics-notes.com/articles/connectivity/wifi-ieee-802-11/channels-frequencies-bands-bandwidth.php
11. https://webstor.srmist.edu.in/web_assets/srm_mainsite/files/files/IEEE802.pdf
12. https://www.dell.com/support/contents/en-ke/article/product-support/self-support-knowledgebase/networking-wifi-and-bluetooth/wi-fi-network-standards-overview
13. https://standards.ieee.org/beyond-standards/the-evolution-of-wi-fi-technology-and-standards/
14. https://www.intel.com/content/www/us/en/support/articles/000005725/wireless/legacy-intel-wireless-products.html
15. https://www.dclessons.com/802-11-standard
16. https://www.pcmag.com/encyclopedia/term/80211-versions
17. http://www.cisco.com/en/US/docs/wireless/wlan_adapter/secure_client/5.1.0/administration/guide/C1_Network_Security.html
18. https://en.wikipedia.org/wiki/List_of_WLAN_channels
19. https://www.cbtnuggets.com/blog/technology/networking/when-to-use-802-11-a-b-g-b-nc-wifi-standards
20. https://www.ciscopress.com/articles/article.asp?p=1873028&seqNum=3