CWDP-305 Exam Dumps - Certified Wireless Design Professional

Comprehensive and Detailed Explanation:

Real Time FFT stands for Real Time Fast Fourier Transform.It is a spectrum analysis tool that displays the maximum signal amplitude detected at each frequency in real time.This visualization helps in identifying transient RF events, such as sporadic interference or brief signal spikes, which might not be captured in averaged spectrum analyses.By providing immediate feedback on the RF environment, Real Time FFT graphs are invaluable for troubleshooting and optimizing WLAN performance.

The ability to locate a client device using WLAN infrastructure relies on the client actively transmitting frames that can be detected by multiple access points. These frames are typically management or data frames used during association, authentication, or normal operation.

If the client device is turned off, it is not transmitting any 802.11 frames. Therefore, the infrastructure cannot detect or triangulate its location using standard methods such as RSSI (Received Signal Strength Indicator) or time difference of arrival.

According to the CWDP-305 Official Study and Reference Guide (Chapter: Designing for Specific Applications), location-based services (LBS) are dependent on the active participation of the client device. Without beacon frames, probe requests, or any other 802.11 activity, no positioning data can be gathered.

“Client devices must be actively transmitting for their location to be calculated through triangulation or trilateration. If a device is powered off, it cannot be tracked by the WLAN infrastructure.”

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

Comprehensive and Detailed Explanation:

Ensuring high availability in RF design involves strategies that provide redundancy and resilience:

C. Deploy using 100 percent overlap:Overlapping coverage areas between APs ensure that if one AP fails, clients can seamlessly connect to another, maintaining network availability.

E. Use dual spectrums:Utilizing both 2.4 GHz and 5 GHz bands allows for flexibility and redundancy. If one band experiences interference or congestion, clients can switch to the other.

A. Powering APs to maximum powercan lead to increased interference and is not a recommended practice for high availability.

B. HSRP/VRRP protocolsare related to router redundancy and do not directly impact RF availability.

D. Deploying 802.3afrefers to Power over Ethernet standards and, while important for powering devices, does not directly contribute to RF high availability.

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.

To calculate the required transmit power (Tx Power) for a desired Effective Isotropic Radiated Power (EIRP), the following formula is used:

EIRP (dBm) = Tx Power (dBm) + Antenna Gain (dBi) - Cable Loss (dB)

Given:

Desired EIRP: 21 dBm

Antenna Gain: 5.85 dBd (which is approximately 8 dBi, since 0 dBd = 2.15 dBi)

Cable Loss: (25 feet / 100 feet) * 4 dB = 1 dB

Plugging into the formula:

21 dBm = Tx Power + 8 dBi - 1 dB

Tx Power = 21 dBm - 8 dBi + 1 dB = 14 dBm

Converting 14 dBm to milliwatts:

10^(14/10) ≈ 25.12 mW

However, since 14 dBm is approximately 25 mW, the closest answer is:

Answer:D

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).

A Wireless Intrusion Prevention System (WIPS) is a network security solution that monitors wireless LANs for unauthorized or malicious activity and provides real-time or automated responses. WIPS can perform a wide array of functions as outlined below:

A. Distributed protocol analysis:

WIPS sensors continuously scan wireless traffic and analyze frames to detect anomalies or policy violations in real time.

C. Performance monitoring and response:

WIPS can identify degradation in WLAN performance due to interference, misconfiguration, or rogue activity and alert administrators or take corrective action.

D. Data forensics and analysis:

WIPS platforms often include historical logging and reporting features that allow administrators to review past events and understand the timeline and impact of wireless threats.

E. Automated threat mitigation:

WIPS can automatically respond to threats by sending deauthentication frames, blocking MAC addresses, or disabling ports to mitigate rogue devices or attacks.

Note:

B. Client access to the distribution system is not a function of WIPS; it refers to client functionality in a WLAN, not a security service offered by WIPS.

“A WIPS performs functions such as rogue detection and mitigation, threat classification, forensic logging, and real-time protocol analysis. It can provide both historical analytics and proactive security enforcement.”

— CWDP-305 Study Guide, Chapter on Post-Design ValidationandTroubleshooting

In Voice over WLAN (VoWLAN) deployments, it's crucial to differentiate between various types of voice-related traffic to ensure optimal Quality of Service (QoS).Real-Time Protocol (RTP) carries the actual voice payload, while control protocols like RTCP manage session control and quality feedback.Assigning distinct priority levels to these traffic types allows the network to prioritize voice payloads appropriately while still handling control traffic efficiently.