WLAN Installation & Configuration Flashcards

What is the function of the 802.11r amendment in a WLAN?

Answer: Enables fast BSS transition (fast roaming) between APs

802.11r defines Fast BSS Transition, reducing roaming latency by pre-authenticating clients before they fully move to a new AP.

A WLC is being configured to use FlexConnect (H-REAP) mode. What happens to client traffic when the WAN link to the WLC goes down?

Answer: The AP locally switches traffic and maintains existing client sessions

In FlexConnect mode, APs can locally switch traffic and maintain client sessions even when connectivity to the WLC is lost.

Which value represents the minimum acceptable SNR for a voice-grade WLAN deployment?

Answer: 25 dB

A minimum SNR of 25 dB is generally recommended for voice applications to ensure low latency and packet loss.

When configuring band steering on a dual-band AP, what is the intended outcome?

Answer: Encourage capable clients to connect on the 5 GHz band

Band steering nudges dual-band capable clients toward the 5 GHz band to reduce congestion on the 2.4 GHz band.

A technician is installing an outdoor AP on a building rooftop. Which grounding method is required to protect against lightning damage?

Answer: Connect the AP to a proper earth ground via a grounding wire and rod

Outdoor APs must be bonded to an earth ground via a grounding wire connected to a grounding rod to provide lightning protection.

What does EIRP stand for in the context of wireless networking?

Answer: Equivalent Isotropically Radiated Power

EIRP (Equivalent Isotropically Radiated Power) is the total power radiated by an antenna system, combining transmit power and antenna gain.

Which 802.11 feature allows an AP to dynamically select the best channel and reduce transmit power to minimize interference with neighboring APs?

Answer: TPC and DFS

Transmit Power Control (TPC) and Dynamic Frequency Selection (DFS) work together to automatically optimize channel selection and power levels.