Which band provides the best balance between range and throughput for enterprise WLANs?

2.4 GHz has only three non-overlapping channels, is heavily congested with non-Wi-Fi devices such as Bluetooth and microwaves, and is limited to lower maximum throughput.

5 GHz supports up to 25 non-overlapping 20 MHz channels (in most regulatory domains), far more than the 3 available in 2.4 GHz, which reduces co-channel interference and supports higher capacity. It supports 802.11a/n/ac/ax with data rates up to multiple Gbps while propagating far enough through standard office environments to serve enterprise deployments effectively.

900 MHz offers excellent range through walls but is not an approved Wi-Fi band under 802.11 standards and delivers very low throughput unsuitable for enterprise use.

60 GHz (802.11ad/WiGig) provides multi-gigabit throughput but has a range measured in meters and is blocked by nearly all physical obstructions, making it impractical for general enterprise coverage.