The Bottom Line: 5GHz and 2.4GHz are simply different frequencies, each with its advantages and disadvantages. 802.11ac devices are able to mitigate some of this disadvantage by using beamforming. In particular, the higher frequency wireless signals of 5GHz networks do not penetrate solid objects nearly as well as 2.4GHz signals, limiting their reach inside buildings with solid walls and floors. Thus, 2.4GHz networks cover a substantially larger range than 5GHz wireless networks. Disadvantages of 5GHz: In general, the higher the frequency of a wireless signal, the shorter its range. 802.11ac in the 5GHz band implements many newer technologies, such as, MU-MIMO, beamforming, etc. The 5GHz band can also offer much higher throughput (using the right technology) with the same channel width. The 2.4GHz frequency range is much more prone to interference, as it is commonly used by other wireless networks in the area, as well as cordless phones, garage door openers and other home appliances and consumer products. Advantages of 5GHz: The 5GHz band is less likely to be congested. 802.11ac specifically expands on that, running entirely in the 5GHz band. However, newer 802.11n and 802.11ac routers have the capability of simultaneous dual-band operation on both 5GHz and 2.4GHz ranges, allowing clients to connect on different bands for more flexibility and less interference. For example, 802.11a wireless operates at 5GHz and 802.11g at 2.4GHz, yet both support the same maximum data rate of 54 Mbps. The frequency range of a wireless radio is only partially related to the speed of a wireless network. Wireless computer network equipment typically uses radio signals in either a 2.4 GHz frequency range, or a 5 GHz range.

2.4 vs 5 ghz