WLAN is a cable-less technology for data communications typically using Ethernet over a local area. The first IEEE 802.11 standard regulating WLAN technology, released in 1997, supported only the 2.4 GHz band, but in 2020 the WLAN technology has begun supporting the 6 GHz band.

As a result, numerous new applications and services are expected to be developed using high-speed and large-capacity data communications based on the extremely wide frequency band of 1200 MHz. However, as with any new technology, engineers face new development challenges, including new testing requirements.