CoAP provides which of the following requirements?

The correct answer is: C. Simplicity and low overhead.

CoAP is a lightweight, RESTful application protocol for constrained devices and low-power networks. It is designed to be simple and efficient, with a small footprint and low overhead. CoAP is also multicast-capable, which makes it well-suited for applications that need to send data to multiple devices at once.

Here is a brief explanation of each option:

• Option A: Multicast support and simplicity. CoAP does support multicast, but it is not its primary focus. The main goal of CoAP is to be simple and efficient, and multicast support is just one of the features that it offers.
• Option B: Low overhead and multicast support. CoAP does have low overhead, but this is not its only advantage. It is also simple and efficient, and it supports multicast.
• Option C: Simplicity and low overhead. This is the correct answer. CoAP is designed to be simple and efficient, with a small footprint and low overhead.
• Option D: Multicast support, Low over head, and simplicity. This option includes all of the features of CoAP, but it is not the most concise way to describe the protocol.