{"id":18054,"date":"2026-09-22T05:08:58","date_gmt":"2026-09-22T05:08:58","guid":{"rendered":"https:\/\/www.examlabs.com\/certification\/?p=18054"},"modified":"2026-09-22T05:09:47","modified_gmt":"2026-09-22T05:09:47","slug":"cwnp-cwna-109-practice-test-questions-and-exam-dumps-part12-q221-240","status":"publish","type":"post","link":"https:\/\/www.examlabs.com\/certification\/cwnp-cwna-109-practice-test-questions-and-exam-dumps-part12-q221-240\/","title":{"rendered":"CWNP CWNA-109 Practice Test Questions and Exam Dumps Part12 Q221-240"},"content":{"rendered":"<h2><b>View Full <\/b><a href=\"https:\/\/www.examlabs.com\/cwna-109-exam-dumps\"><b>CWNP CWNA-109 Exam Dumps<\/b><\/a><b> and Practice Test Dumps<\/b><\/h2>\n<p>&nbsp;<\/p>\n<p><b>Question 221.<\/b><\/p>\n<p><b>Which metric is most useful for determining whether a received Wi-Fi signal is sufficiently above the surrounding noise level?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> SNR<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> EIRP<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> Antenna gain<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> Beacon interval<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. SNR<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Signal-to-noise ratio, or SNR, compares the strength of the desired received signal with the surrounding noise floor. A higher SNR generally means the receiver can distinguish the intended signal more reliably and may support higher modulation and coding schemes. EIRP describes effective transmitted power, antenna gain describes directional concentration of RF energy, and beacon interval controls how often beacon frames are sent. RSSI alone can be misleading because a strong signal may still perform poorly if noise is also high. SNR therefore provides a better indication of usable signal quality and is an important metric during WLAN design, validation, and troubleshooting.<\/span><\/p>\n<p><b>Question 222.<\/b><\/p>\n<p><b>A client receives a signal at -58 dBm with a noise floor of -88 dBm. What is the approximate SNR?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> 20 dB<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> 30 dB<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> 58 dB<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> 88 dB<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 2. 30 dB<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">SNR is calculated as the difference between the received signal level and the noise floor. With a signal of -58 dBm and a noise floor of -88 dBm, the difference is 30 dB. Because SNR is a relative measurement, it is expressed in dB rather than dBm. A 30 dB SNR is generally much better than a 10 dB SNR because the desired signal is significantly stronger relative to background noise. This example also shows why two clients with the same RSSI can have very different performance if the surrounding noise levels differ.<\/span><\/p>\n<p><b>Question 223.<\/b><\/p>\n<p><b>Which condition is most likely to increase frame retries even when RSSI remains relatively strong?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Lower noise and lower contention<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> Better antenna alignment<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> Interference or excessive contention<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> A longer DHCP lease<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. Interference or excessive contention<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Frame retries can increase when transmissions are corrupted by interference, collide because of contention, or fail to receive acknowledgments. Strong RSSI does not guarantee a clean or uncongested RF environment. A client can hear the AP very well while still experiencing poor throughput because neighboring WLANs, hidden nodes, non-Wi-Fi interference, or heavy channel use increase retransmissions. Better antenna alignment and lower noise would normally improve reliability, while DHCP lease duration is unrelated to radio retries. Retry rate is therefore an important troubleshooting metric when users report poor performance despite apparently good signal strength.<\/span><\/p>\n<p><b>Question 224.<\/b><\/p>\n<p><b>Which term describes the percentage of time that a Wi-Fi channel is perceived as busy?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Receive sensitivity<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> Fade margin<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> Spatial stream count<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> Channel utilization**<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. Channel utilization<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Channel utilization indicates how much of the time the RF channel is considered occupied. High utilization can result from the local WLAN, neighboring same-channel WLANs, retransmissions, management frames, or certain forms of interference. A high channel-utilization value often correlates with increased contention and latency because stations must wait longer for transmission opportunities. Receive sensitivity is the minimum signal a receiver can decode, fade margin is a link-budget reliability buffer, and spatial stream count relates to MIMO capabilities. Channel utilization is therefore a key metric when diagnosing capacity and congestion problems.<\/span><\/p>\n<p><b>Question 225.<\/b><\/p>\n<p><b>Which design action is most likely to improve aggregate capacity in a dense WLAN where many APs are forced to reuse the same channels?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Use narrower channels<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> Maximize AP transmit power<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> Add more SSIDs<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> Lower all basic rates to 1 Mbps<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. Use narrower channels<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Narrower channels consume less spectrum and increase the number of distinct channels available for reuse. In dense deployments, this can reduce co-channel contention and improve aggregate capacity, even though each individual client may have a lower peak PHY rate than it would with a wider channel. Maximum transmit power can enlarge cells and worsen contention, while additional SSIDs create management overhead. Very low basic rates also consume significant airtime. Dense WLAN design should optimize total available airtime across the system rather than maximize the theoretical speed of a single link.<\/span><\/p>\n<p><b>Question 226.<\/b><\/p>\n<p><b>Which Wi-Fi 6 feature is designed specifically to help improve spatial reuse among overlapping BSSs?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Block ACK<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> BSS Coloring<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> TKIP<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> Passive scanning<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 2. BSS Coloring<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">BSS Coloring allows Wi-Fi 6 devices to distinguish transmissions from their own BSS from transmissions belonging to overlapping BSSs that may be using the same channel. This information can support more intelligent spatial reuse decisions under suitable conditions. Block ACK improves acknowledgment efficiency, TKIP is an obsolete encryption mechanism, and passive scanning is a discovery method. BSS Coloring does not eliminate co-channel contention, but it is one of the 802.11ax mechanisms intended to improve efficiency in dense deployments where overlapping cells are common.<\/span><\/p>\n<p><b>Question 227.<\/b><\/p>\n<p><b>Which Wi-Fi 6 feature is most directly associated with scheduled power saving for compatible clients?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> DFS<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> MU-MIMO<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> Target Wake Time<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> 802.11r<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. Target Wake Time<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Target Wake Time, or TWT, allows compatible clients and access points to coordinate planned periods when the client wakes to exchange data. During other periods, the client may remain in a lower-power state, potentially improving battery life and reducing unnecessary contention. DFS protects radar systems, MU-MIMO supports simultaneous spatial transmissions to multiple clients, and 802.11r improves roaming authentication efficiency. TWT is particularly useful for devices that communicate periodically rather than continuously, including many IoT use cases. Its real benefit depends on client support and how applications generate traffic.<\/span><\/p>\n<p><b>Question 228.<\/b><\/p>\n<p><b>Which Wi-Fi technology divides a channel into resource units that can be assigned to multiple stations?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> DSSS<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> FHSS<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> CSMA\/CD<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> OFDMA**<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. OFDMA<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">OFDMA divides a Wi-Fi channel into smaller resource units that can be allocated to multiple clients during a transmission opportunity. This can improve efficiency in dense environments where many devices exchange smaller packets. Traditional OFDM normally gives the entire channel to one transmitting station at a time. DSSS and FHSS are older spread-spectrum techniques, while CSMA\/CD is associated with legacy shared Ethernet. OFDMA is a major Wi-Fi 6 capability and is especially useful when network efficiency and latency under multi-client load are more important than maximizing the instantaneous rate of one individual client.<\/span><\/p>\n<p><b>Question 229.<\/b><\/p>\n<p><b>Which technology separates multiple users spatially by using multiple antenna streams?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> MU-MIMO<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> DFS<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> WMM<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> WPA2<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. MU-MIMO<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Multi-User MIMO uses multiple spatial streams to communicate with more than one compatible client during the same transmission opportunity. It increases aggregate efficiency by separating users in the spatial domain. OFDMA, by contrast, separates users through frequency-resource allocation. DFS protects radar-sensitive spectrum, WMM provides traffic prioritization, and WPA2 is a security technology. MU-MIMO performance depends on AP and client capabilities, RF conditions, spatial separation, and traffic patterns. The feature can improve total WLAN efficiency but does not guarantee that every client will simultaneously receive multiple spatial streams.<\/span><\/p>\n<p><b>Question 230.<\/b><\/p>\n<p><b>Which 802.11 feature improves efficiency by acknowledging multiple MPDUs with one acknowledgment exchange?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Probe Response<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> Block ACK<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> Beacon<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> Deauthentication<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 2. Block ACK<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Block acknowledgment allows multiple MPDUs to be acknowledged efficiently rather than requiring a separate ACK for each individual frame. It is commonly used together with A-MPDU aggregation and helps reduce protocol overhead. Probe Responses and Beacons are management frames, while Deauthentication terminates authentication state. As PHY rates increase, overhead becomes increasingly significant, so aggregation and efficient acknowledgment mechanisms are important for improving actual throughput. Block ACK also allows selective identification of which frames were received successfully, supporting more efficient retransmission behavior.<\/span><\/p>\n<p><b>Question 231.<\/b><\/p>\n<p><b>Which aggregation method combines multiple MPDUs into a single larger transmission?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> A-MSDU<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> Fragmentation<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> A-MPDU<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> RTS\/CTS<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. A-MPDU<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">A-MPDU aggregation combines multiple MAC Protocol Data Units into one larger aggregate transmission. Each MPDU remains individually identifiable, which works well with Block ACK and allows selective retransmission if necessary. A-MSDU aggregates MSDUs differently within a MAC frame, while fragmentation divides traffic into smaller pieces rather than combining it. RTS\/CTS is a medium reservation technique. A-MPDU is widely used in modern WLANs because it reduces repeated PHY and channel-access overhead, improving efficiency and throughput while preserving the ability to manage individual MPDUs inside the aggregate.<\/span><\/p>\n<p><b>Question 232.<\/b><\/p>\n<p><b>Which 802.11 mechanism is most directly used to prioritize voice traffic over background traffic at the wireless MAC layer?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> DFS<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> WPA3<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> BSS Coloring<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> WMM**<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. WMM<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Wi-Fi Multimedia, or WMM, provides differentiated contention behavior for traffic categories such as voice, video, best effort, and background. Voice traffic receives more favorable medium-access parameters because it is sensitive to latency and jitter. DFS is a spectrum-management mechanism, WPA3 is a security standard, and BSS Coloring supports spatial reuse. WMM does not reserve guaranteed bandwidth, so it cannot compensate for an overloaded channel. Successful voice performance still depends on sufficient capacity, good RF coverage, low retry rates, and properly configured end-to-end QoS.<\/span><\/p>\n<p><b>Question 233.<\/b><\/p>\n<p><b>Which WMM access category normally receives the most favorable contention parameters?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Voice<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> Background<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> Best Effort<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> Bulk Data<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. Voice<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">The Voice access category receives the most favorable contention parameters because voice traffic is highly sensitive to delay and jitter. Video receives the next-highest priority, while Best Effort and Background traffic receive progressively less favorable treatment. This prioritization helps delay-sensitive traffic gain access to the medium more quickly when multiple traffic classes are competing. However, WMM is not a substitute for capacity planning. If channel utilization is extremely high or RF conditions are poor, voice traffic can still experience unacceptable performance even when it receives the highest available access priority.<\/span><\/p>\n<p><b>Question 234.<\/b><\/p>\n<p><b>Which 802.11 amendment is most directly associated with Fast BSS Transition?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> 802.11k<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> 802.11r<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> 802.11v<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> 802.11e<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 2. 802.11r<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">802.11r introduced Fast BSS Transition, which helps reduce the authentication-related delay involved when a client roams between access points within an ESS. This can be especially important for voice and other real-time applications that are sensitive to interruptions. 802.11k provides radio-resource measurement capabilities, while 802.11v includes BSS Transition Management and other network-management enhancements. 802.11e introduced QoS improvements. Fast transition behavior should always be tested with representative clients because compatibility and implementation quality vary among devices and operating systems.<\/span><\/p>\n<p><b>Question 235.<\/b><\/p>\n<p><b>Which amendment can provide neighbor information that helps a client scan more efficiently for roaming candidates?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> 802.11i<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> 802.11w<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> 802.11k<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> 802.11h<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 3. 802.11k<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">802.11k includes radio-resource measurement capabilities and can provide information about neighboring BSSs. This can help compatible clients avoid scanning every possible channel when searching for a roaming candidate. 802.11i addresses WLAN security, 802.11w introduced management-frame protection, and 802.11h includes spectrum-management functions. 802.11k does not make the roaming decision for the client, but it can provide useful information that reduces scan time. It is commonly discussed with 802.11r and 802.11v as part of enterprise roaming optimization.<\/span><\/p>\n<p><b>Question 236.<\/b><\/p>\n<p><b>Which amendment includes BSS Transition Management and can allow infrastructure to recommend another BSS to a client?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> 802.11a<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> 802.11b<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> 802.11g<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> 802.11v**<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. 802.11v<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">802.11v includes wireless network management capabilities such as BSS Transition Management. This allows WLAN infrastructure to provide clients with information or recommendations about other BSSs that may offer better service. The client still retains control over whether it actually roams. 802.11a, 802.11b, and 802.11g are older PHY technologies and do not provide this specific management feature. When supported by clients, 802.11v can complement 802.11k and 802.11r, but real-world results still depend heavily on endpoint behavior and vendor implementation.<\/span><\/p>\n<p><b>Question 237.<\/b><\/p>\n<p><b>Which WLAN security architecture commonly uses a supplicant, authenticator, and RADIUS server?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> 802.1X\/EAP<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> Open WLAN only<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> Static WEP<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> MAC filtering only<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. 802.1X\/EAP<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">802.1X\/EAP enterprise authentication uses a supplicant on the client, an authenticator in the WLAN infrastructure, and an authentication server commonly implemented with RADIUS. This architecture provides centralized authentication and can support individual user or device credentials. Open WLANs do not provide equivalent identity validation, WEP is obsolete, and MAC filtering is easily circumvented. Enterprise authentication can also integrate with certificates and directory services. Proper certificate validation, RADIUS redundancy, and client configuration are important because authentication failure at any point can prevent otherwise healthy wireless connectivity.<\/span><\/p>\n<p><b>Question 238.<\/b><\/p>\n<p><b>Which security practice is most important for preventing clients from trusting a fraudulent enterprise authentication server?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Disable certificate validation<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> Validate the RADIUS server certificate and trusted CA<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> Hide the SSID<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> Use a shorter passphrase<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 2. Validate the RADIUS server certificate and trusted CA<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Clients should validate the authentication server&#8217;s certificate and verify that it chains to an approved certificate authority. This helps protect against rogue infrastructure that attempts to impersonate the legitimate enterprise authentication service. Disabling certificate validation significantly weakens security, while hiding the SSID provides no meaningful protection against impersonation. Shorter passwords are also undesirable. Certificate trust should be configured centrally whenever possible so users are not asked to manually approve unknown certificates. Proper validation is one of the most important controls in secure 802.1X\/EAP deployments.<\/span><\/p>\n<p><b>Question 239.<\/b><\/p>\n<p><b>Which survey approach provides the best evidence that an installed WLAN meets the needs of production clients?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> Post-deployment validation with representative client devices<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> Predictive modeling only<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> AP inventory review only<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> Checking only wired switch speed<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 1. Post-deployment validation with representative client devices<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Post-deployment validation confirms how the WLAN actually performs after installation. Representative client devices should be used because laptops, phones, scanners, tablets, and voice handsets differ in transmit power, receive sensitivity, antenna design, supported bands, and roaming behavior. Predictive models are valuable but cannot perfectly represent real construction materials, interference, or client behavior. Inventory and wired-speed checks are useful operational tasks but do not validate wireless performance. A strong validation process measures criteria relevant to the design, such as RSSI, SNR, roaming, channel utilization, retries, throughput, and application behavior.<\/span><\/p>\n<p><b>Question 240.<\/b><\/p>\n<p><b>Users report strong signal and successful authentication, but application performance becomes poor only when many users are active. Which area should be investigated first?<\/b><\/p>\n<ol>\n<li><b><\/b><span style=\"font-weight: 400;\"> SSID spelling<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>2.<\/b><span style=\"font-weight: 400;\"> AP serial numbers<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>3.<\/b><span style=\"font-weight: 400;\"> DHCP hostname format<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>4.<\/b><span style=\"font-weight: 400;\"> Airtime capacity, contention, channel utilization, and client density**<\/span><\/li>\n<\/ol>\n<p><b>Correct Answer: 4. Airtime capacity, contention, channel utilization, and client density<\/b><\/p>\n<p><b>Explanation:<\/b><\/p>\n<p><span style=\"font-weight: 400;\">When coverage and authentication are already working but performance degrades as the number of active users increases, the problem is likely related to shared airtime and capacity. The investigation should examine channel utilization, active-client counts, application demand, retry rates, channel width, data rates, neighboring same-channel cells, and overall channel reuse. Strong RSSI does not provide additional airtime, and successful authentication proves only that access control is functioning. Dense WLANs must be designed and validated for aggregate workload, not merely for coverage. Capacity problems are therefore best diagnosed by analyzing how users collectively consume the shared wireless medium.<\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>View Full CWNP CWNA-109 Exam Dumps and Practice Test Dumps &nbsp; Question 221. Which metric is most useful for determining whether a received Wi-Fi signal is sufficiently above the surrounding noise level? SNR 2. EIRP 3. Antenna gain 4. Beacon interval Correct Answer: 1. SNR Explanation: Signal-to-noise ratio, or SNR, compares the strength of the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1648,1647],"tags":[],"_links":{"self":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/18054"}],"collection":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/comments?post=18054"}],"version-history":[{"count":2,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/18054\/revisions"}],"predecessor-version":[{"id":18058,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/18054\/revisions\/18058"}],"wp:attachment":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/media?parent=18054"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/categories?post=18054"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/tags?post=18054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}