Which of the following is not LPWAN technologies?a.LoRab.NB-IoTc.WiFid.SigFox

The option that is not a Low-Power Wide-Area Network (LPWAN) technology is c. WiFi.

LPWAN technologies are designed for long-range communications at a low bit rate among connected objects, such as sensors and stations. They are optimized for power consumption and range, making them suitable for IoT and M2M applications.

a. LoRa (Long Range) is a spread spectrum modulation technique derived from chirp spread spectrum (CSS) technology.

b. NB-IoT (Narrowband IoT) is a Low Power Wide Area Network radio technology standard developed by 3GPP to enable a wide range of cellular devices and services.

d. SigFox is a French global communications service provider that leverages a unique approach to wireless connectivity to allow any object to seamlessly connect to the internet.

On the other hand, WiFi is a high-power, short-range technology. It's designed for high data rate applications and is not considered a LPWAN technology.

The option that is not a Low-Power Wide-Area Network (LPWAN) technology is c. WiFi.

LPWAN technologies are designed for long-range communications at a low bit rate among connected objects, such as sensors powered by a battery. The main LPWAN technologies include LoRa, NB-IoT, and SigFox.

On the other hand, WiFi is a high-speed Internet connection and local network connection technology, which is not designed for long-range communications and therefore, it consumes more power.