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What do you mean by communication protocol?
A communication protocol is a system of rules that allows two or more entities of a communications system to transmit information via any kind of variation of a physical quantity. Communicating systems use well-defined formats for exchanging various messages.
What is communication protocol in embedded system?
Communication Protocols are a set of rules that allow two or more communication systems to communicate data via any physical medium. The rules, regulations, synchronization between communication systems, syntax to be followed and semantics are all defined by the term protocol.
What is the purpose of communication protocols?
Communication protocols allow different network devices to communicate with each other. They are used in both analog and digital communications and can be used for important processes, ranging from transferring files between devices to accessing the internet.
What is used for communication in embedded system?
The majority of embedded communication systems can be classified as either point-to-point networks (data links) or shared media networks (data highways). These systems are simple and reliable. Reliability is high since correct transmission between two nodes only depends on a single transmitter and receiver.
How to perform communication using message queues?
To perform communication using message queues, following are the steps − Step 1 − Create a message queue or connect to an already existing message queue (msgget()) Step 2 − Write into message queue (msgsnd()) Step 3 − Read from the message queue (msgrcv()) Step 4 − Perform control operations on the message queue (msgctl())
Why is message queue software asynchronous in nature?
Since message queue software is asynchronous, the software sending a message does not have to access the message queue at the same time as the receiver. Asynchronous communication between software allows for the decoupling of different programs.
Which is the best Cloud message queue software?
Alibaba Cloud Message Queue includes AlibabaMQ for Apache RocketMQ, a distributed message queue service that supports message-based asynchronous communication among microservices, distributed systems, and serverless applications. Ably is an enterprise-ready pub/sub messaging platform.
Which is a pointer to the message queue?
MSG_INFO − Returns an msginfo structure containing information about the consumed system resources by the message queue. The third argument, buf, is a pointer to the message queue structure named struct msqid_ds. The values of this structure would be used for either set or get as per cmd.