ECSE exam questions

Ekahau Tools & Methodology (3%)

• Ekahau AI Pro: This tool is designed for Wi-Fi network planning, site surveys, and troubleshooting. Its primary functions include creating predictive designs, performing active and passive surveys, and generating detailed reports.
• Ekahau Sidekick 2: Enhances Wi-Fi survey accuracy by providing precise measurements of Wi-Fi signal strength, noise, and spectrum utilization with its integrated high-quality antennas and spectrum analyzer.
• Ekahau Guide to Awesome Wi-Fi: This process involves designing and optimizing Wi-Fi networks to ensure reliable and efficient performance. It includes steps like requirements gathering, predictive design, site surveys, and post-deployment validation.

RF Fundamentals (8%)

• Inverse Square Law (ISL):
• It’s significant in RF planning because it describes how signal strength diminishes as the distance from the source increases, which is crucial for determining AP placement. Please check the equation online.
• Free Space Path Loss (FSPL): Affects Wi-Fi signal strength by reducing the power of the signal as it travels through free space. The loss increases with distance and frequency.
• Frequency, Wavelength, and Amplitude: The relationship is described by the formula
  

  $$c=f\times \lambda$$

  , where ( c ) is the speed of light, ( f ) is the frequency, and ( \lambda ) is the wavelength. Amplitude represents the signal strength.

Wi-Fi Predictive Design (30%)

• Key Considerations: Include understanding the environment, user density, bandwidth requirements, and interference sources to ensure adequate coverage and capacity.
• Determining Access Points: Based on the coverage area, signal strength requirements, and capacity needs. Tools like Ekahau AI Pro can help simulate different scenarios.
• Simulating Wi-Fi Coverage: Involves inputting floor plans into Ekahau tools, setting design requirements, and using the software to predict AP placement and signal coverage.

Wi-Fi Validation Surveys (28%)

• Post-Installation Survey Steps: Include planning the survey path, collecting data on signal strength, noise levels, and performance metrics across the site.
• Crucial Metrics: Signal strength, Signal-to-Noise Ratio (SNR), throughput, and error rates.
• Using Ekahau Tools: To validate coverage and performance by comparing actual survey data with the predictive design and identifying areas that need adjustments.

Association & Roaming (5%)

• Association vs Re-association: Association is the initial connection of a device to a network, while re-association happens when a device moves and connects to a different AP.
• Influencing Factors: Signal strength, AP load, and client preferences.
• 802.11k, 802.11r, and 802.11v: These amendments improve the association process by providing faster and more seamless roaming capabilities.

Contention (9%)

• Channel Contention: Refers to the competition between devices for access to the wireless medium. It impacts network performance by causing delays and potential data collisions.
• Distributed Coordination Function (DCF): Manages contention using a ‘listen before talk’ protocol to minimize collisions.
• Interference and Network Load: Can increase contention, leading to reduced throughput and increased latency.

Wi-Fi Security (3%)

• Wi-Fi Security Options: WPA3 is recommended for enterprise use due to its enhanced encryption and security features, while WEP and WPA are not recommended.
• WPA3 Advantages: Includes features like Simultaneous Authentication of Equals (SAE) for better protection against offline dictionary attacks and forward secrecy.

These answers provide a foundational understanding of the topics covered in the ECSE exam and should aid in your exam preparation.

Disclaimer: The aforementioned questions are not taken from the Ekahau ECSE exam questions.

ECSE exam questions sample

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