CWNP CWNA-109 問題集

質問 1：
You are the network administrator for ABC Company. Your manager has recently attended a wireless security seminar. The seminar speaker taught that a wireless network could be hidden from potential intruders if you disabled the broadcasting of the SSID in Beacons and configured the access points not to respond to Probe Request frames that have a null SSID field.
Your manager suggests implementing these security practices. What response should you give to this suggestion?
A. Any tenants in the same building using advanced penetration testing tools will be able to obtain the SSID by exploiting WPA EAPOL-Key exchanges. This poses an additional risk of exposing the WPA key.
B. To improve security by hiding the SSID, the AP and client stations must both be configured to remove the SSID from association request and response frames. Most WLAN products support this.
C. Any 802.11 protocol analyzer can see the SSID in clear text in frames other than Beacons frames. This negates any security benefit of trying to hide the SSID in Beacons and Probe Response frames.
D. This security practice prevents manufacturers' client utilities from detecting the SSID. As a result, the SSID cannot be obtained by attackers, except through social engineering, guessing, or use of a WIPS.
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 2：
What security solution is required to be used in place of Open System Authentication for all open network
802.11 implementations in the 6 GHz band?
A. OWE
B. Kerberos
C. WPA3-Enterprise
D. WPA3-SAE
正解：A

質問 3：
Which one of the following is not a factor considered when calculating the Link Budget for an outdoor point-to- point WLAN bridge link?
A. Operating frequency
B. Receive antenna gain
C. MU-MIMO capabilities of the bridges
D. Transmit power
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 4：
What statement about 802.3, Clause 33 Power over Ethernet is true?
A. When using CAT5 cabling, you increase the maximum draw available to the PD over that available with CAT6.
B. Only endpoint PSEs are supported.
C. The lowest voltage drop is achieved when using CAT6 cable instead of Cat5 or CAT5e.
D. Only midspan PSEs are supported.
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 5：
What factors will have the most significant impact on the amount of wireless bandwidth available to each station within a BSS? (Choose 2)
A. The presence of co-located (10m away) access points on non-overlapping channels
B. The layer 3 protocol used by each station to transmit data over the wireless link
C. The power management settings in the access point's beacons
D. The number of clientstations associated to the BSS
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 6：
You have implemented an 802.11ax WLAN for a customer. All APs are four stream HE APs. The customer states that it is essential that most of the clients can use the OFDMA modulation scheme. What do you tell the customer?
A. OFDMA is an optional feature of 802.11ax and most APs don't even support it
B. All 5 GHz PHYs use OFDM modulation, so you will achieve OFDMA everywhere in 5 GHz
C. The clients that must support OFDMA must also be upgraded to 802.11ax
D. If the devices support 802.11ac, they can be updated to support OFDMA through driver upgrades
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 7：
A client STA must choose the best AP for connectivity. As part of the evaluation, it must verify compatible data rates. What can the client STA use to verify that an AP supports the same data rates that it supports?
A. Beacon frames transmitted by the AP
B. Authentication frames transmitted by the other client STAs
C. Data frames sent between the AP and current clients STAs
D. Probe request frames transmitted by other client STAs
正解：A
解説: (Topexam メンバーにのみ表示されます)