Question

which of the following is not a feature of the CoAP protocol
a. Web transfer protocol
b. M2M application
c. Request-response application
d. Synchronous communication

Answer 1

Answer:

a. Web transfer protocol

Explanation:

• The Constrained Application Protocol (CoAP) is defined as a specialized web transfer protocol for use with constrained nodes and constrained networks in the Internet of Things (CoAP, 2014). As it can be extracted from the definition, this protocol is specifically tailored for the IoT and M2M applications. The major standardization of this protocol has been carried out by the IETF Constrained RESTful environments (CoRe) Working Group and the core is specified in Shelby et al. (2014). This application layer protocol can be seen as an enhancement of HTTP for low power devices. It is based on the successful REST model, in which resources are available under a URL and clients can access those resources using the GET, PUT, POST and DELETE methods. Additionally, CoAP also supports publish-subscribe thanks to the usage of an extended GET method.

Answer 2

Answer:

a

Explanation:

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