Cisco Certified Support Technician (CCST) NetworkingNetwork AccessMedium
A technician is setting up a new wireless network in a small office. The office has several devices that support Wi-Fi 6 (802.11ax) and require high throughput. The technician needs to choose a frequency band that offers higher bandwidth and less interference from older devices like microwaves or cordless phones. Which frequency band is most suitable for this scenario?
- A60 GHz band
- B900 MHz band
- C2.4 GHz band
- D5 GHz band
Show answer & explanationAnswer & explanation
Correct answer: D. 5 GHz band
The 5 GHz band offers higher bandwidth and more available channels than the 2.4 GHz band, leading to less congestion and interference, which is ideal for high-throughput Wi-Fi 6 devices. The 2.4 GHz band is prone to interference from common household appliances.
Why the other options are wrong
- A. The 60 GHz band (WiGig) offers extremely high speeds but has very limited range and struggles with penetration through walls, making it unsuitable for general office coverage.
- B. The 900 MHz band is generally used for long-range, low-data-rate applications, not high-throughput Wi-Fi.
- C. The 2.4 GHz band has a smaller number of non-overlapping channels and is susceptible to interference from other devices like microwaves and Bluetooth.
5 GHz Wi-Fi Band
A wireless frequency band that offers higher data rates, more available channels, and less interference compared to the 2.4 GHz band, but typically has a shorter range and poorer penetration.
- Higher bandwidth and data rates
- More non-overlapping channels
- Less interference from other devices
- Shorter range and poorer wall penetration
Memory trick: Fast 5 is short, Slow 2 is long.