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

Discount is available for the official ECSE training session 28 till 31 May 2024. Please send an mail to ITNET: info@itnet.lu