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- CWTS PW0-071
26.
The 802.11i amendment to the standard addresses which of the following technologies?
- A.Quality of service
- B.DSSS
- C.Security
- D.MIMO
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| 802.11i addresses security. 802.11e addresses quality of service. DSSS is a PHY technology defi ned in the IEEE 802.11 standard, and MIMO (multiple-input multipleoutput) is used with IEEE 802.11n technology. |
27.
Which of the following best describes the Wi-Fi Alliance?
- A.U.S.-based standards organization
- B.Interoperability testing organization
- C.Works with the FCC to verify compliance
- D.Local regulatory body for Europe
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Wi-Fi Alliance performs interoperability testing for IEEE 802.11 wireless LAN standards-based equipment. The IEEE creates standards. The FCC is the local regulatory authority responsible for frequency regulation in the United States and ETSI is a European standards organization responsible for producing standards for information and communications technologies. |
28.
Which of the following is addressed by the Wi-Fi Multimedia (WMM) certification?
- A.Security/encryption
- B.Fast transition
- C.Management frame protection
- D.Quality of service
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| WMM is a proactive Wi-Fi Alliance certifi cation for quality of service. WPA and WPA are certifi cations that address wireless security. IEEE 802.11w is for protection of management frames and IEEE 802.11r is for Fast Transition (FT); neither currently has an associated Wi-Fi Alliance certifi cation. |
29.
Wi-Fi Protected Setup was designed for which of the following wireless applications?
- A.Small office/home office (SOHO) organizations
- B.Enterprise organizations
- C.FCC interoperability
- D.Security organizations
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Wi-Fi Protected Setup was designed with SOHO users in mind. Enterprise organizations use IEEE 802.11i, WPA, and WPA2 certifi cations. The FCC is the local regulatory authority responsible for frequency regulation in the United States. |
30.
The 802.11g standard uses which two Physical layer technologies? (Choose 2.)
- A.FHSS
- B.OFDM
- C.ERP-OFDM
- D.DSSS
- E.MIMO
- Answer & Explanation
- Report
Answer : [C, D]
Explanation :
Explanation :
| 802.11g can use ERP-OFDM and DSSS. The 802.11 standard specifies FHSS for 1 and 2 Mbps. OFDM is used with 802.11a devices, and MIMO (multiple-input multiple-output) is used with 802.11n technology. |
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