CWS Wireless Technologies & Network Fundamentals 2

Question 1

Which IEEE 802.11 amendment introduced OFDMA as a key feature to improve multi-user efficiency?

Accepted Answer

802.11ax

Answer

802.11ax (Wi-Fi 6) introduced OFDMA, allowing simultaneous transmissions to multiple clients by dividing channels into resource units.

Question 2

What is the primary purpose of a Distributed Antenna System (DAS) in wireless networking?

Accepted Answer

Extend coverage in large or obstructed venues

Answer

A DAS distributes antenna nodes throughout a building or venue to provide consistent wireless coverage in areas where a single AP would struggle.

Question 3

In the context of 802.11 networks, what does the term 'BSS' stand for?

Accepted Answer

Basic Service Set

Answer

BSS (Basic Service Set) is the fundamental building block of an 802.11 WLAN, consisting of an AP and its associated client stations.

Question 4

Which frequency band is exclusively used by 802.11ad (WiGig) for very short-range, high-throughput communications?

Accepted Answer

60 GHz

Answer

802.11ad operates in the 60 GHz band, enabling multi-gigabit speeds over very short distances with limited wall penetration.

Question 5

What is the role of the Distribution System (DS) in an infrastructure-mode WLAN?

Accepted Answer

Connects access points to each other and to wired networks

Answer

The Distribution System interconnects APs and bridges wireless traffic to the wired LAN, enabling roaming and inter-AP communication.

(CWS) Certified Wireless Specialist Practice Test