検証するCWNA-109専門知識試験-試験の準備方法-完璧なCWNA-109関連受験参考書

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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
  • WLAN プロトコルとデバイス: 802.11 MAC および PHY、3 つの主要な 802.11 フレーム タイプの目的、MAC フレーム形式、および 802.11 チャネル アクセス方法に関連する用語に重点を置いています。
トピック 2
  • WLAN ネットワーク アーキテクチャと設計コンセプト: このトピックでは、Power over Ethernet (PoE) の説明と実装について説明します。さらに、このトピックでは、さまざまなワイヤレス LAN アーキテクチャ、カバレッジ要件、ローミングの考慮事項、ワイヤレス ネットワークの一般的な独自機能についても説明します。
トピック 3
  • WLAN 規制と標準: このトピックでは、WLAN とネットワーク業界組織の役割について説明します。また、さまざまな物理層 (PHY) ソリューション、拡散スペクトル技術、および 802.11 WLAN 機能の概念についても説明します。

>> CWNA-109専門知識 <<

よくできたCWNP CWNA-109専門知識 は主要材料 & 正確的なCWNA-109関連受験参考書

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CWNP Wireless Network Administrator (CWNA) 認定 CWNA-109 試験問題 (Q123-Q128):

質問 # 123
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?

正解:A

解説:
OFDMA is a new modulation scheme introduced in 802.11ax that allows multiple users to share the same channel by dividing it into smaller subchannels called resource units (RUs). This improves the efficiency and capacity of the WLAN by reducing contention and overhead. However, to use OFDMA, both the AP and the client must support 802.11ax and negotiate the parameters of the subchannel allocation. Therefore, the customer needs to upgrade the clients that require OFDMA to 802.11ax devices12.
The other options are not correct because they do not reflect the reality of OFDMA. Option B is incorrect because OFDMA is a mandatory feature of 802.11ax for both downlink and uplink transmissions, and all
802.11ax APs must support it1. Option C is incorrect because OFDM and OFDMA are different modulation schemes, and OFDM does not allow multiple users to share the same channel. Option D is incorrect because
802.11ac devices cannot support OFDMA through driver upgrades, as they lack the hardware and firmware capabilities to do so2.
References: 1:CWNA-109Official Study Guide, page 144 2: OFDMA


質問 # 124
What 802.11 amendment provides Radio Resource Management (RRM) capabilities, allowing client stations to request neighbor reports from an AP to assist with roaming decisions?

正解:C

解説:
802.11k, also known as Radio Resource Management, allows client stations to request a neighbor report from their currently associated AP, which contains information about nearby APs, including channel and signal information. This helps the client make faster and more informed roaming decisions without needing to perform a full scan of all available channels. 802.11k is often deployed alongside 802.11r for fast, efficient roaming, and 802.11v for network-assisted client steering.


質問 # 125
What is the purpose of Protected Management Frames (PMF), also known as 802.11w?

正解:B

解説:
Protected Management Frames (PMF), defined by the 802.11w amendment, provide cryptographic protection for certain 802.11 management frames, including deauthentication and disassociation frames. Without PMF, these frames are sent unencrypted and unauthenticated, making them vulnerable to spoofing in denial-of-service attacks where an attacker sends forged deauthentication frames to disconnect clients. PMF is optional under WPA2 but is mandatory for WPA3-Personal and WPA3-Enterprise connections.


質問 # 126
Which directional antenna types are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation?

正解:C

解説:
Patch and panel antennas are directional antenna types that are commonly used by indoor Wi-Fi devices in a MIMO multiple spatial stream implementation. These antennas have a flat rectangular shape and can be mounted on walls or ceilings to provide coverage in a specific direction. They have a moderate gain and a relatively wide beamwidth, making them suitable for multipath environments where signals can reflect off different surfaces and create multiple spatial streams. Patch and panel antennas can also support polarization diversity, which means they can transmit and receive both horizontally and vertically polarized waves, increasing the MIMO performance. References: 1, Chapter 2, page 72; 2, Section 2.4


質問 # 127
You are implementing a VHT-capable AP. Which one of the following channels is available in the 802.11-
2016 standard that was not available before the ratification of 802.11 ac?

正解:D

解説:
Channel 144 is a new channel that was added to the 5 GHz band by the 802.11ac amendment, which defines the VHT (Very High Throughput) PHY for WLANs. Channel 144 has a center frequency of 5720 MHz and a bandwidth of 20 MHz. It can also be combined with adjacent channels to form wider channels of 40 MHz, 80 MHz, or 160 MHz. Channel 144 is available in some regions, such as North America and Europe, but not in others, such as Japan and China . References: [CWNA-109 Study Guide], Chapter 3: Antennas and Accessories, page 121; [CWNA-109 Study Guide], Chapter 3: Antennas and Accessories, page 115;
[Wikipedia], List of WLAN channels.


質問 # 128
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意志があるところには道があることは広く受け入れられています。いわば、決まった目的を持った人は必ず成功するでしょう。 CWNA-109証明書を取得することは、あなたのキャリアにおける地位を向上させるための素晴らしく迅速な方法です。 CWNA-109試験に合格するというこの目標を達成するには、外部の支援が必要です。このキャリアには10年以上携わっており、CWNA-109試験問題では、夢のCWNA-109認定を得るための支援を受けるだけでなく、一流のサービスをオンラインで楽しむことができます。

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