300-425 · Question #274
Which two statements are correct about 5 GHz WLAN compared to 2.4 GHz? (Choose two.)
The correct answer is A. 5 GHz has more non-overlapping channels. C. 5 GHz is less prone to interference. D. 5 GHz supports higher throughput.. 5 GHz offers more non-overlapping channels, less interference, and higher throughput than 2.4 GHz, though at the cost of range and wall penetration.
Question
Which two statements are correct about 5 GHz WLAN compared to 2.4 GHz? (Choose two.)
Options
- A5 GHz has more non-overlapping channels.
- B5 GHz provides better coverage through walls.
- C5 GHz is less prone to interference.
- D5 GHz supports higher throughput.
- E5 GHz requires fewer APs for coverage.
How the community answered
(56 responses)- A89% (50)
- B4% (2)
- E7% (4)
Why each option
5 GHz offers more non-overlapping channels, less interference, and higher throughput than 2.4 GHz, though at the cost of range and wall penetration.
The 5 GHz band provides up to 24 or more non-overlapping 20 MHz channels in the US compared to only 3 non-overlapping channels (1, 6, 11) in the 2.4 GHz band, greatly reducing co-channel interference between neighboring APs.
5 GHz signals have shorter wavelengths that attenuate more rapidly through solid materials like walls, so 2.4 GHz actually provides better coverage through physical obstacles.
The 2.4 GHz band is heavily congested with interference from microwaves, Bluetooth devices, baby monitors, and neighboring WLANs, while 5 GHz occupies a less crowded spectrum with far fewer competing devices in typical environments.
5 GHz supports wider channel bonding options (40, 80, and 160 MHz) and higher-order modulation schemes under 802.11ac and 802.11ax, enabling significantly higher maximum data throughput than 2.4 GHz.
Because 5 GHz has shorter range and weaker wall penetration, it requires more APs - not fewer - to achieve equivalent coverage compared to 2.4 GHz.
Concept tested: 5 GHz vs 2.4 GHz WLAN band characteristics
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-3/b_cisco_enterprise_networks_hd_wireless_design_guide/b_cisco_enterprise_networks_hd_wireless_design_guide_chapter_011.html
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