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Socket.IO primarily uses the WebSocket protocol with polling as a fallback option, while providing the same interface. [5] Although it can be used simply as a wrapper for WebSockets, it provides many additional features such as heartbeats and timeouts. [5] It can be installed with the Node Package Manager (NPM). [6]
Polling (computer science) Polling, or interrogation, refers to actively sampling the status of an external device by a client program as a synchronous activity. Polling is most often used in terms of input/output (I/O), and is also referred to as polled I/O or software-driven I/O. A good example of hardware implementation is a watchdog timer.
What is JSONP polling, with respect to AJAX long polling? --Abdull 14:24, 6 ... There are various Socket.IO client libraries for other languages, so I guess Socket.IO ...
WebSocket is a computer communications protocol, providing a simultaneous two-way communication channel over a single Transmission Control Protocol (TCP) connection. The WebSocket protocol was standardized by the IETF as RFC 6455 in 2011. The current specification allowing web applications to use this protocol is known as WebSockets. [1]
Launch status check. A launch status check, also known as a "go/no go poll" and several other terms, occurs at the beginning of an American spaceflight mission in which flight controllers monitoring various systems are queried for operation and readiness status before a launch can proceed. For Space Shuttle missions, in the firing room at the ...
Extensible Messaging and Presence Protocol (abbreviation XMPP, originally named Jabber[1]) is an open communication protocol designed for instant messaging (IM), presence information, and contact list maintenance. [2] Based on XML (Extensible Markup Language), it enables the near-real-time exchange of structured data between two or more network ...
Polling system. In queueing theory, a discipline within the mathematical theory of probability, a polling system or polling model is a system where a single server visits a set of queues in some order. [ 1 ] The model has applications in computer networks and telecommunications, [ 2 ] manufacturing [ 3 ][ 4 ] and road traffic management.
In computer science, asynchronous I/O (also non-sequential I/O) is a form of input/output processing that permits other processing to continue before the I/O operation has finished. A name used for asynchronous I/O in the Windows API is overlapped I/O. Input and output (I/O) operations on a computer can be extremely slow compared to the ...