. . . . . . . . enables open application layer for constrained nodes.

April 15, 2024 by rawan239

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.