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What is service discovery in IoT?
Service Discovery is a process of automatically finding appropriate services and their providers in IoT taking into consideration requests’ context and QoS. In IoT, many heterogeneous objects offer different services so it is challenging to locate desirable services due to the considerable diversity and large scale.
Which layer of IoT uses HTTP protocol?
The transport layer is the protocol supporting the movement of the data, such as Transmission Control Protocol (TCP), HTTP or User Datagram Protocol (UDP). The application layer is the interface between the IoT device and the network with which it will communicate.
What is IoT mechanism?
An IoT system consists of sensors/devices which “talk” to the cloud through some kind of connectivity. Once the data gets to the cloud, software processes it and then might decide to perform an action, such as sending an alert or automatically adjusting the sensors/devices without the need for the user.
How are communication protocols used in IoT devices?
IoT devices use different communication and messaging protocols at different layers. While developing an IoT device, the selection of the protocol largely depends on the type, layer, and function to be performed by the device. MQTT, XMPP, DDS, AMQP, and CoAP are a few of the widely used communication protocols for the IoT application layer.
Which is the IoT messaging protocols, DDS or MQTT?
A smart thermostat that can be accessed from a smartphone via a web server. A gaming console with instant messaging between the two online players. DDS is also based on a publish-subscribe model. DDS connects the devices directly, unlike MQTT, which connects them to the server.
Which is an example of a server side discovery router?
The router queries a service registry, which might be built into the router, and forwards the request to an available service instance. The following diagram shows the structure of this pattern. An AWS Elastic Load Balancer (ELB) is an example of a server-side discovery router.
Which is simpler client side discovery or client-side discovery?
Compared to client-side discovery, the client code is simpler since it does not have to deal with discovery. Instead, a client simply makes a request to the router It also has the following drawbacks: