The correct answer is D. AMPS.
AMPS stands for Advanced Mobile Phone System. It is a 2G cellular network technology that was first deployed in the United States in 1983. AMPS is not a standard of WLAN because it is a cellular network technology, while WLAN is a wireless local area network technology.
HIPER-LAN stands for High Performance Radio LAN. It is a family of wireless local area network (WLAN) standards developed by the European Telecommunications Standards Institute (ETSI). HIPER-LAN/2 is the second generation of HIPER-LAN standards. It was developed in the late 1990s and early 2000s. HIPER-LAN/2 is a high-speed WLAN standard that can support data rates of up to 54 Mbps.
IEEE 802.11b is a standard for wireless local area networks (WLANs). It was developed by the Institute of Electrical and Electronics Engineers (IEEE) in 1999. IEEE 802.11b is a 2.4 GHz WLAN standard that can support data rates of up to 11 Mbps.
WLAN stands for Wireless Local Area Network. It is a type of computer network that uses radio waves to transmit data between devices. WLANs are typically used to connect computers, printers, and other devices within a home or office.