P.S.JpshikenがGoogle Driveで共有している無料の2026 CWNP CWNA-109ダンプ：https://drive.google.com/open?id=1dBrobChJV7tLu-yox-6HuyoEZPMx--Z_
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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: WLAN Network Security | 15% | - Security threats and mitigation
|
| Topic 2: WLAN Network Architecture and Design Concepts | 15% | - WLAN deployment architectures
|
| Topic 3: Radio Frequency (RF) Technologies | 20% | - RF fundamentals and behavior
|
| Topic 4: WLAN Protocols and Devices | 20% | - 802.11 frame types and formats
|
| Topic 5: WLAN Troubleshooting and Management | 15% | - Monitoring and maintenance
|
| Topic 6: WLAN Regulations and Standards | 15% | - Regulatory bodies and frequency bands
|
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質問 # 161
You are implementing a multi-AP WLAN and fast secure roaming is essential. Which one of the following methods is an IEEE 802.11 standard method for fast roaming?
正解：D
解説：
FT (Fast Transition) is an IEEE 802.11 standard method for fast roaming. FT is defined in the IEEE 802.11r amendment and is also known as Fast BSS Transition (FBT) or Fast Secure Roaming. FT is a feature that allows a client station to quickly switch from one AP to another within the same ESS (Extended Service Set) without having to re-authenticate and re-associate with each AP. This reduces the latency and packet loss that may occur during roaming, thus improving the user experience and maintaining the security of the connection.
FT works by using pre-authentication and key caching mechanisms that allow the client station and the APs to exchange security information before the actual roaming occurs. This way, when the client station decides to roam to a new AP, it can use a fast reassociation request and response that contain only a few fields, instead of a full authentication and association exchange that require more time and data. References: 1, Chapter 9, page
367; 2, Section 6.3
質問 # 162
What best describes WPA2 in relation to 802.11 wireless networks?
正解：D
解説：
WPA2 (Wi-Fi Protected Access 2) is a security certification program developed by the Wi-Fi Alliance to secure wireless computer networks. It is important to understand the following:
* WPA2 and the 802.11 Standard: While WPA2 is based on elements of the 802.11i amendment to the
802.11 standard, it is not itself a standard but rather a certification to ensure devices comply with certain security criteria, including the correct implementation of CCMP (Counter Mode Cipher Block Chaining Message Authentication Code Protocol) and AES (Advanced Encryption Standard).
* CCMP/AES Implementation: WPA2 enhances the security of wireless networks by using CCMP for encryption, which is based on AES, a robust encryption algorithm. This represents a significant security improvement over WEP (Wired Equivalent Privacy) and WPA (Wi-Fi Protected Access) that used TKIP (Temporal Key Integrity Protocol).
* WPA vs. WPA2: WPA was the interim security enhancement over WEP, utilizing TKIP for encryption. WPA2, however, moved to the more secure AES-based encryption method. Contrary to option C, WPA2 does not enhance security by using TKIP; it uses CCMP/AES.
Therefore, option B correctly describes WPA2 as a certification program ensuring devices properly implement the more secure CCMP/AES encryption methods.
References:
Wi-Fi Alliance website for WPA2 certification details.
IEEE 802.11i-2004: Amendment for Enhanced Security.
質問 # 163
What 802.11 amendment introduces Wireless Network Management (WNM) capabilities, including BSS Transition Management, which allows an AP to suggest that a client roam to a different AP?
正解：D
解説：
802.11v, known as Wireless Network Management, introduces several capabilities, including BSS Transition Management. This feature allows an AP or WLAN controller to send a request to a client device suggesting that it roam to a different, more suitable AP, such as one with a stronger signal or lower channel utilization. While the client is not obligated to comply, many modern devices support this feature, which helps improve load balancing and overall network performance, a technique commonly referred to as client steering.
質問 # 164
What term describes the geographic area within which two or more BSSs on the same channel can hear each other's transmissions and must therefore share airtime?
正解：B
解説：
A co-channel contention domain refers to the collection of all BSSs and stations operating on the same channel that are within range of one another and must therefore share the same airtime through the CSMA/CA contention process. As more APs and clients are added to the same co- channel contention domain, available airtime per device decreases, which is why careful channel planning and AP density design are important in minimizing unnecessary overlap between same- channel cells.
質問 # 165
When implementing PoE, what role is played by a switch?
正解：D
解説：
PoE stands for Power over Ethernet, which is a technology that allows network devices to receive power and data over the same Ethernet cable. PoE eliminates the need for separate power adapters or outlets for devices such as IP phones, cameras, or APs. PoE requires two types of devices: PSE (Power Sourcing Equipment) and PD (Powered Device). A PSE is a device that provides power to the Ethernet cable, such as a switch, injector, or splitter. A PD is a device that receives power from the Ethernet cable, such as an IP phone, camera, or AP. When implementing PoE, a switch plays the role of a PSE.
質問 # 166
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CWNA-109資格参考書: https://www.jpshiken.com/CWNA-109_shiken.html
P.S.JpshikenがGoogle Driveで共有している無料の2026 CWNP CWNA-109ダンプ：https://drive.google.com/open?id=1dBrobChJV7tLu-yox-6HuyoEZPMx--Z_