__ tags,devices, smart phones useful in identification.

__ टैग, डिवाइस, स्मार्ट फोन पहचान में उपयोगी।

__ tags,devices, smart phones useful in identification.

A

IETF 6LoWPAN

B

IEFT CoAP

C

RFID/NFC

D

IEEE 802.154.LoWPAN

Explanation

RFID (Radio Frequency Identification) and NFC (Near Field Communication) are technologies that are commonly used for identification and tracking purposes. These technologies use radio waves to communicate between a tag (or device) and a reader. They are often employed in applications such as access control, inventory management, contactless payment systems, and even smartphone interactions.
RFID typically uses longer-range communication (from a few centimeters to several meters), while NFC is a subset of RFID technology with much shorter range, typically within 10 cm.

Correct Answer: C) RFID/NFC

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