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Constrained Application Protocol
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Application Layer — IoT & Embedded
Protocol Overview
Full Name
Constrained Application Protocol
Abbreviation
CoAP
OSI Layer
Application Layer
Category
IoT & Embedded
Default Port
5683
RFC
RFC 7252
About CoAP
Lightweight RESTful protocol designed for constrained IoT devices and low-power networks. Uses UDP with optional reliability, observe notifications, and DTLS security.
Application Layer
IoT & Embedded
Port 5683
Standards Reference
CoAP is defined in RFC 7252, published by the Internet Engineering Task Force (IETF). RFCs are the official standards documents for internet protocols and are freely available for public review.