Match each wireless networking technical requirement or deployment scenario on the left wi… — CompTIA A+ (Core 1 & Core 2)

Match each wireless networking technical requirement or deployment scenario on the left with the corresponding IEEE 802.11 standard on the right.

High-density stadium AP deployment requiring Orthogonal Frequency-Division Multiple Access (OFDMA) and Target Wake Time (TWT) across both $2.4\text{ GHz}$ and $5\text{ GHz}$ bands.IEEE 802.11ax (Wi-Fi 6)
Wireless bridge configuration requiring theoretical throughput up to $6.9\text{ Gbps}$ using $160\text{ MHz}$ wide channel bonding and 256-QAM modulation strictly limited to the $5\text{ GHz}$ band.IEEE 802.11ac (Wi-Fi 5)
Dual-band ( $2.4\text{ GHz}$ and $5\text{ GHz}$ ) legacy infrastructure upgrade supporting up to 4 spatial streams via MIMO to achieve a maximum theoretical speed of $600\text{ Mbps}$ .IEEE 802.11n (Wi-Fi 4)
Legacy point-of-sale terminal network restricted to the $2.4\text{ GHz}$ spectrum using Direct-Sequence Spread Spectrum (DSSS) modulation with a maximum theoretical speed of $11\text{ Mbps}$ .IEEE 802.11b

Answer

High-density stadium AP deployment with OFDMA and TWT maps to IEEE 802.11ax (Wi-Fi 6). 5 GHz-only deployment with 160 MHz bonding and 256-QAM maps to IEEE 802.11ac (Wi-Fi 5). Dual-band deployment supporting 4 spatial streams up to 600 Mbps maps to IEEE 802.11n (Wi-Fi 4). Legacy 2.4 GHz DSSS deployment capped at 11 Mbps maps to IEEE 802.11b.

Each scenario correctly maps to its defining standard based on frequency band support, maximum theoretical throughput, and hardware features: 802.11ax introduces OFDMA and TWT across dual/tri-bands; 802.11ac is limited strictly to 5 GHz and supports 256-QAM with 160 MHz channel bonding; 802.11n introduced dual-band MIMO capped at 600 Mbps; and 802.11b is the legacy 2.4 GHz DSSS standard limited to 11 Mbps.

Step-by-Step Solution

Analyze the technical requirements for the high-density stadium scenario (OFDMA, TWT, dual-band operation).

OFDMA and Target Wake Time (TWT) are key innovations introduced in IEEE 802.11ax (Wi-Fi 6) to handle high-density client environments on both

2.4\text{ GHz}

and

5\text{ GHz}

frequencies.

Matching advanced channel division and power-saving features to their defining standard.

Evaluate the 5 GHz-exclusive high-throughput requirement (160 MHz bonding, 256-QAM, up to 6.9 Gbps).

IEEE 802.11ac (Wi-Fi 5) operates exclusively on

5\text{ GHz}

and utilizes 256-QAM and

80/160\text{ MHz}

channel bonding to achieve gigabit-class throughput.

Distinguishing frequency band constraints between dual-band standards and 5 GHz-only standards.

Evaluate the dual-band 600 Mbps throughput requirement using MIMO.

IEEE 802.11n (Wi-Fi 4) introduced dual-band MIMO with up to 4 spatial streams (

4 \times 4

), giving a theoretical throughput limit of

600\text{ Mbps}

(

150\text{ Mbps}

per stream using

40\text{ MHz}

channels).

Identifying the standard that first brought MIMO spatial multiplexing and dual-band flexibility.

Analyze the legacy 2.4 GHz scenario using DSSS capped at 11 Mbps.

IEEE 802.11b was one of the original 1999 standards operating purely in the

2.4\text{ GHz}

spectrum using DSSS, limited to

11\text{ Mbps}

Matching legacy modulation schemes and speed caps to early Wi-Fi standards.

Key Concept

Differentiating Wi-Fi standards (802.11b, 802.11n, 802.11ac, 802.11ax) by frequency bands, maximum theoretical throughput, modulation techniques, and multi-user performance features.

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