正確的なCWNA-109対応資料 &合格スムーズCWNA-109全真模擬試験 |実用的なCWNA-109合格問題CWNP Wireless Network Administrator (CWNA)
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CWNA-109全真模擬試験、CWNA-109合格問題
CWNA-109認定は、あなたの能力の最高の証明です。ただし、このようなCWNA-109試験を準備する自由時間が少ない作業担当者にとっては容易ではなく、人々は常に未知のものに対する恐怖を感じ、突然の変化に対処することはできません。ただし、CWNA-109試験問題はあなたのそばに立つことができます。そして、優れたCWNA-109学習教材を提供することに専念する決意です。 CWNA-109試験問題の無料デモをお試しください。詳細を理解して選択することができます。
CWNP CWNA-109 認定試験の出題範囲:
| トピック | 出題範囲 |
|---|---|
| トピック 1 |
|
| トピック 2 |
|
| トピック 3 |
|
CWNP Wireless Network Administrator (CWNA) 認定 CWNA-109 試験問題 (Q28-Q33):
質問 # 28
What facts are true regarding controllers and APs in a Split MAC architecture?
- A. Using centralized data forwarding, APs never tag Ethernet frames with VLAN identifiers or 802.1p CoS.
- B. An IP tunnel is established between the AP and controller for AP management and control functions.
- C. Management and data frame types must be processed locally by the AP, while control frame types must be sent to the controller.
- D. With 802.1X/EAP security, the AP acts as the supplicant and the controller acts as the authenticator.
正解:B
解説:
The fact that is true regarding controllers and APs in a Split MAC architecture is that an IP tunnel is established between the AP and controller for AP management and control functions. A Split MAC architecture is a WLAN architecture where some of the MAC layer functions are performed by the APs (such as encryption, decryption, and frame acknowledgement) and some are performed by the controllers (such as authentication, association, roaming, and QoS). To communicate with each other, the APs and controllers establish an IP tunnel that carries the management and control frames between them. The IP tunnel can use protocols such as Lightweight Access Point Protocol (LWAPP) or Control And Provisioning of Wireless Access Points (CAPWAP). References: [CWNP Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109], page 372; [CWNA: Certified Wireless Network Administrator Official Study Guide: ExamCWNA-109], page 362.
質問 # 29
What feature of 802.1 lax (HE) is managed with beacon and trigger frames and is primarily a power management method, but also provides more efficient access to the channel used within a BSS?
- A. TWT
- B. OFDMA
- C. BSS Color
- D. UL-MU-MIMO
正解:C
質問 # 30
You are troubleshooting a WLAN problem and you suspect hidden node as the cause. What should you look for in a protocol analyzer?
- A. Frames transmitted from the AP without acknowledgement
- B. Retransmitted frames from multiple STAs with higher retry counts than other STAs Frames with the HN bit set to 1
- C. Frames with the retry bit set to 0
正解:B
解説:
The CWNA Official Study Guide (CWNA-109), Chapter 8: Troubleshooting and Spectrum Analysis, explains that hidden node problems occur when two or more client stations cannot hear each other but can both communicate with the same access point. This leads to collisions at the AP because the clients transmit simultaneously without sensing each other's signals.
"Hidden node problems can often be identified in a protocol analyzer by observing excessive retransmissions from specific client stations. These retransmissions occur because the station's frames are not acknowledged due to collisions caused by other stations that the transmitter cannot hear."
- CWNA-108 Study Guide, Chapter 8, Hidden Node Problem Analysis, p. 393-395 Therefore, when analyzing for a hidden node issue, you will typically observe:
* Retransmitted frames from multiple STAs.
* Higher retry counts for affected stations compared to others.
Hence, the correct answer is C. Retransmitted frames from multiple STAs with higher retry counts than other STAs.
質問 # 31
The BSA of an AP covers the area used by the sales and marketing department. Thirty-five stations operate in this space. The users indicate that they need more throughput and all stations are 5 GHz capable 802.11ac clients. The current AP configuration uses 20 MHz channels in both 2.4 GHz and 5 GHz. What is the least expensive solution available for increasing throughput for these users without implementing configuration options that are not recommended?
- A. Install a second AP in the coverage area
- B. Use a 40 MHz channel on the 2.4 GHz radio
- C. Use a 160 MHz channel on the 5 GHz radio
- D. Use a 40 MHz channel on the 5 GHz radio
正解:D
解説:
The least expensive solution available for increasing throughput for these users without implementing configuration options that are not recommended is to use a 40 MHz channel on the 5 GHz radio. This solution can double the channel bandwidth and increase the data rates for the 5 GHz capable 802.11ac clients. Using a
40 MHz channel on the 5 GHz radio is also less likely to cause co-channel interference or overlap with other channels than using a 40 MHz channel on the 2.4 GHz radio, which has only three non-overlapping channels.
Using a 160 MHz channel on the 5 GHzradio may provide even higher throughput, but it may also consume too much of the available spectrum and cause more interference with other devices or networks. Installing a second AP in the coverage area may also improve the throughput, but it may require additional costs and configuration. References: [CWNP Certified Wireless Network Administrator Official Study Guide:
ExamCWNA-109], page 216; [CWNA: Certified Wireless Network Administrator Official Study Guide:
ExamCWNA-109], page 206.
質問 # 32
A dual-band 802.11ac AP must be powered by PoE. As a class 4 device, what power level should be received at the AP?
- A. 30 W
- B. 12.95 W
- C. 25.5 W
- D. 15.4 W
正解:C
解説:
PoE has different standards that define different power levels for PSEs and PDs. The original standard, IEEE
802.3af, defines two classes of PSEs: Class 3 (15.4 W) and Class 4 (30 W). The newer standard, IEEE 802.3at, also known as PoE+, defines four classes of PSEs: Class 0 (15.4 W), Class 1 (4 W), Class 2 (7 W), and Class 3 (12.95 W). The power level received at the PD is always lower than the power level provided by the PSE, due to cable resistance and power dissipation. The IEEE standards specify the minimum power level that must be received at the PD for each class of PSE. For a Class 4 PSE, the minimum power level received at the PD is
25.5 W910. References: CWNA-109 Study Guide, Chapter 7: Power over Ethernet (PoE), page
295; CWNA-109Study Guide, Chapter 7: Power over Ethernet (PoE), page 289.
質問 # 33
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