Wireless Technology Flashcards

Which 802.11 amendment introduced the 6 GHz band for Wi-Fi use?

Answer: 802.11ax

802.11ax (Wi-Fi 6E) was the first amendment to include the 6 GHz band, providing additional spectrum with less interference.

What is the primary function of a wireless LAN controller (WLC) in an enterprise network?

Answer: To centrally manage and configure multiple access points

A WLC centrally manages AP configurations, roaming, security policies, and firmware updates across the enterprise WLAN.

In wireless communications, what is 'multipath fading'?

Answer: Signal degradation caused by multiple reflected copies of a signal arriving at different times

Multipath fading occurs when reflected RF signals arrive at the receiver slightly delayed, causing destructive interference with the direct signal.

What type of antenna pattern is most appropriate for providing coverage in a long hallway?

Answer: Yagi directional antenna

A Yagi antenna's narrow, elongated beam pattern is ideal for directing RF energy down a long hallway corridor.

Which wireless standard is specifically designed for short-range, high-bandwidth transmission in the 60 GHz band?

Answer: 802.11ad (WiGig)

802.11ad (WiGig) operates in the 60 GHz mmWave band, offering multi-gigabit speeds over very short distances.

A technician is deploying an outdoor point-to-point wireless bridge over 3 miles. What is the most critical calculation to perform?

Answer: Fresnel zone clearance

Fresnel zone clearance ensures the radio path is free of obstructions that would attenuate the signal on a long-distance wireless link.

What does EIRP stand for in wireless system design?

Answer: Effective Isotropic Radiated Power

EIRP (Effective Isotropic Radiated Power) is the total power radiated in a single direction, combining transmitter output power and antenna gain.