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RFC 7252
Title: The Constrained Application Protocol (CoAP)
Author: Z. Shelby, K. Hartke, C. Bormann
Status: Standards Track
Stream: IETF
Date: June 2014
Mailbox: zach.shelby@arm.com,
hartke@tzi.org,
cabo@tzi.org
Pages: 112
Characters: 258789
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-core-coap-18.txt
URL: http://www.rfc-editor.org/rfc/rfc7252.txt
The Constrained Application Protocol (CoAP) is a specialized web
transfer protocol for use with constrained nodes and constrained
(e.g., low-power, lossy) networks. The nodes often have 8-bit
microcontrollers with small amounts of ROM and RAM, while constrained
networks such as IPv6 over Low-Power Wireless Personal Area Networks
(6LoWPANs) often have high packet error rates and a typical
throughput of 10s of kbit/s. The protocol is designed for machine-
to-machine (M2M) applications such as smart energy and building
automation.
CoAP provides a request/response interaction model between
application endpoints, supports built-in discovery of services and
resources, and includes key concepts of the Web such as URIs and
Internet media types. CoAP is designed to easily interface with HTTP
for integration with the Web while meeting specialized requirements
such as multicast support, very low overhead, and simplicity for
constrained environments.
This document is a product of the Constrained RESTful Environments Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and suggestions
for improvements. Please refer to the current edition of the Internet
Official Protocol Standards (STD 1) for the standardization state and
status of this protocol. Distribution of this memo is unlimited.
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