In wireless networks, dual-band devices are capable of transmitting in either of two standard frequency ranges. Modern Wi-Fi home networks feature dual-band broadband routers that support both 2.4 GHz and 5 GHz channels.
2.4GHz vs 5GHz WiFi: What's the Difference?
By providing separate wireless interfaces for each band, dual-band 802.11n and 802.11ac routers offer maximum flexibility when setting up a home network. Some home devices require the legacy compatibility and extended signal range that 2.4 GHz offers, while others require the additional network bandwidth that 5 GHz provides.
Dual-band routers offer connections designed for each user’s needs. Many home Wi-Fi networks suffer from wireless interference caused by the prevalence of 2.4GHz consumer gadgets, such as cordless phones, which use Frequency Hopping Spread Spectrum modulation. This is where the signal hops around the 2.4GHz spectrum instead of staying on a single channel.
Microwaves can also interfere with wireless signals because of the radio signals they 'leak' during use. The ability to use 5 GHz on a router avoids these problems because the technology supports 23 non-overlapping channels.
