Browse Definitions :
Definition

Constrained Application Protocol (CoAP)

Contributor(s): Matthew Haughn

Constrained Application Protocol (CoAP) is a protocol that specifies how low-power compute-constrained devices can operate in the internet of things (IoT). Designed by the Internet Engineering Task Force (ITEF), CoAP is specified in IETF RFC 7252.

CoAP is designed to enable simple, constrained devices to join the IoT even through constrained networks with low bandwidth and low availability. The protocol is generally used for machine-to-machine (M2M) communication.

CoAP functions as a sort of HTTP for constrained devices, enabling such component level equipment as sensors or actuators to communicate on the IoT, being controlled and passing along their data as part of a system. The protocol is designed for reliability in low bandwidth and high congestion through its low power draw and low network overhead. According to Jullian Vermillard, Sierra Wireless principle engineer of software, in a network with limited connectivity or a lot of congestion CoAP can continue to work where TCP-based protocols such as MQTT fail to complete a handshake.

The efficient and conservative traits of CoAP can enable devices operating in poor signal quality to send their data reliably or enable a satellite in orbit maintain to its distant communication successfully. Despite CoAp’s ability to run on small devices, it supports networks with billions of nodes. For security, the DTLS parameters chosen for default are an equivalent to 3072 bit RSA keys.

This was last updated in January 2018

Continue Reading About Constrained Application Protocol (CoAP)

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • PCI DSS (Payment Card Industry Data Security Standard)

    The Payment Card Industry Data Security Standard (PCI DSS) is a widely accepted set of policies and procedures intended to ...

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance framework

    A compliance framework is a structured set of guidelines that details an organization's processes for maintaining accordance with...

SearchSecurity

  • Trojan horse (computing)

    In computing, a Trojan horse is a program downloaded and installed on a computer that appears harmless, but is, in fact, ...

  • identity theft

    Identity theft, also known as identity fraud, is a crime in which an imposter obtains key pieces of personally identifiable ...

  • DNS over HTTPS (DoH)

    DNS over HTTPS (DoH) is a relatively new protocol that encrypts domain name system traffic by passing DNS queries through a ...

SearchHealthIT

  • telemedicine (telehealth)

    Telemedicine is the remote delivery of healthcare services, such as health assessments or consultations, over the ...

  • Project Nightingale

    Project Nightingale is a controversial partnership between Google and Ascension, the second largest health system in the United ...

  • medical practice management (MPM) software

    Medical practice management (MPM) software is a collection of computerized services used by healthcare professionals and ...

SearchDisasterRecovery

SearchStorage

  • M.2 SSD

    An M.2 SSD is a solid-state drive (SSD) that conforms to a computer industry specification and is used in internally mounted ...

  • kilobyte (KB or Kbyte)

    A kilobyte (KB or Kbyte) is a unit of measurement for computer memory or data storage used by mathematics and computer science ...

  • virtual memory

    Virtual memory is a memory management capability of an operating system (OS) that uses hardware and software to allow a computer ...

Close