Free Practice Questions for CWNP CWDP-305 Exam

Among common construction materials, fire-rated steel doors present the highest level of RF attenuation. Steel reflects and absorbs significant RF energy, often reducing signal strength by 10–20 dB or more.

From CWDP-305:

“Fire-rated metal doors and elevator shafts are among the most attenuating structures in a building. These materials reflect and absorb RF signals, severely limiting Wi-Fi propagation.”

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on ProtocolandSpectrum Analysis

Understanding both the physical layout and logical configuration of the network is critical. The two most helpful documents for that are:

Blueprints:Provide the architectural layout of the facility, including walls, materials, and structural elements that affect RF propagation.

Network Closet Locations:Identify where networking equipment such as switches and patch panels are located for physical cabling and AP backhaul planning.

From CWDP-305:

“Accurate blueprints and physical infrastructure documentation, such as IDF/MDF locations, are essential for physical and logical WLAN planning.”

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on Wireless Design Process

Band steering is a technique used to encourage dual-band clients to connect to the less congested 5 GHz band.However, some clients may not respond to steering attempts and persist in attempting to connect on the 2.4 GHz band.To ensure connectivity for these persistent clients, APs are designed to eventually respond to their Probe Requests on the 2.4 GHz band after a certain number of ignored attempts.

The CWDP-305 Official Study and Reference Guide states:

"Band steering mechanisms must account for clients that do not support or respond to steering attempts, allowing them to connect on the 2.4 GHz band after a defined number of ignored Probe Requests."

When conducting a predictive site survey, it's essential to configure the simulated APs to reflect the expected real-world conditions.If dynamic Radio Resource Management (RRM) will be utilized, setting the AP transmit power to an estimated average level that matches the expected client devices, such as 25 mW, ensures that the predictive model accurately represents the operational environment.This approach helps in designing a WLAN that provides optimal coverage and performance.

Comprehensive and Detailed Explanation:

In environments like museums, where aesthetics are paramount, it's essential to ensure that wireless equipment doesn't detract from the visual appeal. Using a plastic cover that matches the environment allows the access point (AP) to blend seamlessly with its surroundings without compromising signal quality. This approach maintains the integrity of the museum's design while providing the necessary wireless coverage.

Option B:Locking the AP inside a metal box can severely degrade the wireless signal due to signal attenuation caused by metal enclosures.

Option C:Placing APs between walls and I-beams can obstruct signal propagation, leading to poor coverage and performance issues.

Option D:Using outdated technology like 802.11b not only fails to meet current performance standards but also doesn't address the aesthetic requirement.

Comprehensive and Detailed Explanation:

Co-Channel Interference (CCI) in the 2.4 GHz band can significantly degrade WLAN performance due to the limited number of non-overlapping channels available.If the WLAN was primarily designed for 5 GHz, the 2.4 GHz band serves as a secondary or best-effort option.In such cases, turning off 2.4 GHz radios on some APs can reduce CCI by minimizing overlapping coverage areas, thereby improving overall network performance.

In cloud-managed WLAN architectures, the standard procedure involves pre-configuring the access point (AP) profiles within the cloud management platform. Once these profiles are set, the APs are connected to the network, where they automatically reach out to the cloud controller to retrieve their specific configurations. This method streamlines deployment, ensuring consistency and reducing manual configuration errors.

A passive survey is the most appropriate survey type when diagnosing coverage and signal strength issues. It listens to beacons and probe responses to map the RF environment, showing actual signal levels, noise levels, and AP visibility across the site. Passive surveys are particularly valuable for understanding how clients "see" the network when associating.

From CWDP-305:

“Passive surveys are used to validate RF coverage and detect interference. They listen to beacon and other management frames to determine AP coverage areas without needing to associate to a specific AP.”

Active surveys require client association and are more suited for performance-related assessments (like throughput and latency), while predictive surveys are used for pre-deployment modeling.

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on Post-Design ValidationandTroubleshooting

Site survey adapters are often specialized devices with enhanced sensitivity and performance characteristics compared to standard client Wi-Fi adapters.These specialized adapters can detect weaker signals and provide more detailed RF information, leading to higher RSSI readings during surveys.Consequently, standard client devices may experience lower RSSI values in the same environment.

The CWDP-305 Official Study and Reference Guide notes:MetaGeek Community

"Survey adapters are typically more sensitive than standard client devices, which can result in discrepancies between survey data and actual client experiences."

Comprehensive and Detailed Explanation:

IEEE 802.3at, also known as PoE+, provides up to 25.5 watts of power per port. To support 6 access points requiring PoE+ power:

25.5 W/AP × 6 APs = 153 W

Considering some overhead for power loss and future scalability, a minimum PoE budget of 180 W is recommended to ensure reliable operation.