Repeaters work on the physical layer and are generally used to extend the network. This also applies to WLAN repeaters. They are used to extend the range ofWLANs where the radio radiation of the access points is no longer sufficient or their field strength is reduced by walls and ceilings and no longer permits high transmission rates
. WLAN repeaters receive the radio frequencies of the access points (AP), amplify them and transmit the received radio signal as an amplified signal. For this purpose, WLAN repeaters establish a connection from the end device to the WLAN repeater and another from the WLAN repeater to the WLAN router or access point. They are usually designed to support the most important 802.11 versions such as 802.11a, 802 .11b, 802. 11g and 802.11n. This also means that they operate in dual-band with radio frequencies in the 2.4 GHz and 5 GHz bands. WLAN repeaters handle WLAN encryption, which can be Wired Equivalent Privacy (WEP) or WiFi Protected Architecture
(WPA) in the classic version or as WPA2.