CWDP-305 Exam Dumps - CWNP CWDP Wi-Fi Design Questions and Answers

When working in elevated environments, such as installing APs on ceilings higher than standard heights (e.g., warehouse or industrial sites), safety becomes a critical priority. According to the CWDP-305 Study Guide, proper personal protective equipment (PPE) is essential and typically includes a hardhat to protect from falling objects, a high-visibility vest to ensure visibility among other workers or moving machinery, and a body belt or harness when working at height. These safety requirements are commonly enforced by OSHA and are also discussed in wireless site survey preparation sections.

Comprehensive and Detailed Explanation:

In environments with highly reflective materials, such as manufacturing facilities, the use of Short Guard Intervals (SGI) can lead to increased inter-symbol interference due to multipath propagation. SGI reduces the guard interval from 800ns to 400ns, which can improve throughput in environments with minimal interference. However, in reflective environments, the shorter interval may not provide sufficient time to mitigate the effects of delayed signals, leading to higher error rates. Therefore, it is recommended to disable SGI on the 2.4 GHz band in such environments to maintain reliable communication.

Comprehensive and Detailed Explanation:

In 802.1X/EAP authentication, the authenticator (typically the AP or controller) communicates with the RADIUS server using a shared secret for mutual authentication.If this shared secret is misconfigured or does not match on both ends, the RADIUS server will reject authentication requests, leading to client association failures.Therefore, verifying that the shared secret is correctly configured and matches on both the authenticator and the RADIUS server is a critical troubleshooting step.Techimike

When the WLAN controller and APs reside on different subnets, a router is required to facilitate communication between them. The router enables Layer 3 routing, allowing the APs to discover and communicate with the controller across subnet boundaries.

802.11 admission control mechanisms are employed to manage and regulate the bandwidth resources available in a WLAN.By controlling the admission of traffic into the network, these mechanisms ensure that high-priority traffic, such as voice or video, receives the necessary resources for optimal performance.Admission control settings are configured separately for each Access Category (AC), allowing granular control over different types of traffic.

Wi-Fi 6E introduces access to the 6 GHz spectrum, which provides a significantly larger number of non-overlapping 20 MHz, 40 MHz, and even 80 MHz and 160 MHz channels than the 5 GHz band. This abundance of spectrum allows channel bonding (e.g., 40 MHz) with minimal adjacent channel interference (ACI).

From CWDP-305:

“The availability of contiguous spectrum in the 6 GHz band allows for wider channels, such as 40 MHz and 80 MHz, to be used more frequently without interference issues seen in the 5 GHz band.”

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on Designing for Specific Applications

Constraints in network design refer to any limitations that must be worked within during the planning, design, and deployment phases of a project. These constraints shape the decision-making process and ultimately impact the outcome and success of the network.

According to the CWDP-305 Official Study and Reference Guide (Chapter: Wireless Design Process), the following are all common types of constraints:

Timeline: Project deadlines and delivery schedules that limit how long the design or deployment phases can take.

Personnel: Availability of skilled engineers, project managers, and support staff to execute and maintain the design.

Politics: Organizational culture, internal resistance, or conflicting stakeholder priorities that may influence technical decisions.

Budget: Financial limitations that restrict the number or type of components, tools, or services that can be purchased.

“Constraints such as time, money, human resources, and even political considerations are among the most critical factors influencing a WLAN design.”

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

Conducting site surveys in environments like heavy machinery repair facilities presents unique safety challenges. These areas may have hazards such as moving equipment, loud noises, and airborne particles. To ensure personal safety, surveyors must wear Personal Protective Equipment (PPE), which may include hard hats, safety glasses, ear protection, and steel-toed boots.

The CWDP-305 exam objectives emphasize the importance of safety during site surveys, stating the need to:

"Select and use appropriate design methodologies... Cameras; Personal Protective Equipment (PPE)."

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This underscores the necessity of PPE in certain survey environments.

Options like low gain antennas, low power APs, and indoor APs pertain to technical aspects of the survey but do not address the safety requirements of the surveyor.

The wavelength (λ) of a radio wave is calculated using the formula:

λ = c / f

Where:

c = speed of light (approximately 3 x 10^8 meters/second)

f = frequency in HzScribd

For 802.11ac operating at 5.5 GHz:Quizlet

λ = 3 x 10^8 / 5.5 x 10^9 ≈ 0.0545 meters ≈ 5.45 cm

This approximates to 5.5 cm (2.16 inches).

Comprehensive and Detailed Explanation:

In 802.11b, the 1 Mbps data rate usesDirect Sequence Spread Spectrum (DSSS)with an 11-bit Barker code. Each bit of data is represented by an 11-chip sequence, resulting in a chip rate of:

1 Mbps × 11 chips/bit = 11 Mchips/s

However, thechip raterefers to the rate at which the chips (the smaller units of data in DSSS) are transmitted. For 802.11b, the chip rate is11 Mchips/sfor the 1 Mbps data rate.