Which statement about 900 MHz WLANs is supported by the material?

• A. They are more expensive and provide slower data throughput.
• B. They offer higher throughput than 2.4/5 GHz.
• C. They require no regulatory compliance.
• D. They have the same cost as 2.4/5 GHz.

Answer: (A)

Lower-frequency wireless LANs trade speed for reach. The 900 MHz band can cover longer distances and penetrate walls more effectively than the higher-frequency 2.4/5 GHz bands, thanks to its longer wavelength. However, this advantage comes with slower data throughput because the available channel bandwidths are narrower and the modulation schemes tend to be older, limiting how much data can be carried per second. The equipment for 900 MHz WLANs is usually less common and more specialized, which can drive up costs compared to mainstream 2.4/5 GHz gear. Regulatory compliance is still required for wireless devices, so the idea that no regulatory rules apply isn’t accurate. Statements claiming higher throughput or equal costs to 2.4/5 GHz don’t align with how 900 MHz systems typically perform and are priced.