Case Studies & Practical Application Flashcards

An outdoor stadium deploys Wi-Fi for fan engagement. Coverage maps show good RSSI but users report slow speeds during games. What is the MOST likely cause?

Answer: Airtime is being consumed by high client density causing contention

In high-density environments, even strong RSSI does not prevent airtime contention when thousands of clients compete for channel access simultaneously.

A logistics company installs WLAN in a metal-shelved warehouse. After installation, large dead zones are found in aisles. The site survey was done without shelves installed. What is the ROOT CAUSE?

Answer: Metal shelving causes multipath and signal absorption not captured in the pre-deployment survey

Metal shelving significantly attenuates and reflects RF signals; a survey performed before fixtures are in place fails to capture the real post-deployment RF environment.

A coffee shop owner wants to provide guest Wi-Fi while protecting the POS system on the same AP. Which configuration BEST achieves this?

Answer: Configure separate SSIDs mapped to separate VLANs with firewall rules between them

VLAN segmentation with firewall policies between VLANs isolates guest traffic from the POS network while allowing both to share the same physical AP infrastructure.

During a WLAN audit, you discover clients are associating to an SSID that matches your corporate network but originates from an unknown device. What type of attack is this?

Answer: Evil twin (honeypot) AP attack

An evil twin attack involves a rogue AP broadcasting a legitimate-looking SSID to lure clients into associating with it, enabling credential theft or traffic interception.

A hotel deploys Wi-Fi with per-room coverage using APs in hallways. Guests in corner rooms report weak signal. Which antenna type would BEST improve coverage into corner rooms?

Answer: Patch antennas aimed toward corner rooms from hallway APs

Patch antennas provide directional gain and can be aimed precisely at corner rooms where omnidirectional coverage from hallway APs is weakest.

A company's security team reports that client devices are being disconnected from the WLAN without their consent. A packet capture shows repeated deauthentication frames. What security feature would PREVENT this attack?

Answer: 802.11w Management Frame Protection (PMF)

802.11w (PMF) encrypts and authenticates management frames including deauthentication frames, preventing spoofed deauth attacks.

A manufacturing plant needs WLAN for barcode scanners that use legacy 802.11b/g. The new APs support 802.11ax. What configuration concern should be addressed to maintain backward compatibility without hurting modern client performance?

Answer: Set minimum basic rates to 11 Mbps to drop legacy 802.11b rates but keep legacy clients on 2.4 GHz

Raising the minimum basic rate to 11 Mbps removes 1, 2, and 5.5 Mbps 802.11b rates, reducing overhead while keeping 802.11g-capable scanners functional on 2.4 GHz.