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Difficulty: HardWireless Networking Standards and Technologies

A network administrator is evaluating wireless technologies to optimize an enterprise Wi-Fi deployment for high client density and performance. Match each wireless networking technology on the left with its correct operational characteristics on the right.

  • OFDMA (Orthogonal Frequency-Division Multiple Access)Divides a single wireless channel into smaller sub-carriers (Resource Units) to communicate with multiple client devices simultaneously within the same transmission window.
  • MU-MIMO (Multi-User Multiple Input Multiple Output)Leverages multiple spatial antennas to transmit independent data streams concurrently to separate receiving devices.
  • Channel BondingCombines adjacent frequency channels to form a wider transmission band, increasing maximum theoretical throughput.
  • Band SteeringDetects dual-band client devices and automatically encourages them to connect to the less congested 5 GHz frequency band.

Answer

OFDMA matches sub-carrier channel division into Resource Units; MU-MIMO matches concurrent multi-device spatial stream transmission; Channel Bonding matches combining adjacent channels to increase bandwidth; Band Steering matches directing dual-band clients from 2.4 GHz to 5 GHz.
OFDMA divides frequency channels into sub-carriers (Resource Units) for parallel client transmissions. MU-MIMO uses spatial streams to transmit separate data to multiple devices concurrently. Channel bonding aggregates adjacent channels to increase data throughput. Band steering actively moves dual-band clients to the 5 GHz frequency band to relieve 2.4 GHz congestion.

Step-by-Step Solution

1
Identify the primary function of OFDMA in Wi-Fi 6 (802.11ax)
OFDMA operates in the frequency domain, subdividing a channel into smaller Resource Units to transmit to multiple clients simultaneously.
This reduces contention and latency in high-density wireless environments.
2
Differentiate MU-MIMO from OFDMA
MU-MIMO operates in the spatial domain by utilizing spatial streams across antennas to send dedicated streams to separate devices.
Unlike SU-MIMO, which serves one client at a time per antenna array, MU-MIMO serves multiple clients concurrently.
3
Recognize Channel Bonding mechanics
Channel bonding combines two or more contiguous 20 MHz channels (e.g., creating a 40 MHz or 80 MHz channel).
Wider channel width increases data throughput, though it reduces the overall number of available non-overlapping channels.
4
Understand Band Steering implementation
Band steering monitors probe requests and directs dual-band client devices to associate on the 5 GHz band rather than 2.4 GHz.
This optimizes network performance by balancing traffic and offloading the more congested 2.4 GHz spectrum.

Key Concept

Advanced Wireless Technologies and Spectrum Optimization
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Topics

Wireless Networking Standards and Technologies

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