ietf 6lowpan
ieft coap
rfid/nfc
ieee 802.15.4.lowpan
Answer is Wrong!
Answer is Right!
The correct answer is: B. ieft coap
CoAP (Constrained Application Protocol) is a lightweight, application layer protocol for constrained nodes and devices. It is designed to be simple and efficient, and to work well with low-bandwidth and low-power networks. CoAP is an open standard, and is supported by a number of different vendors and products.
The other options are incorrect for the following reasons:
- A. ietf 6lowpan is a protocol that enables IPv6 to be used on low-power, lossy networks (LLNs). It is not an application layer protocol.
- C. rfid/nfc are technologies for radio-frequency identification. They are not application layer protocols.
- D. ieee 802.15.4.lowpan is a physical layer and medium access control (MAC) layer protocol for LLNs. It is not an application layer protocol.
CoAP is a good choice for applications that require a simple, efficient, and open application layer protocol for constrained nodes and devices. It is supported by a number of different vendors and products, and is well-suited for use in low-bandwidth and low-power networks.