download the new version for android Final Draft 12.0.9.110

TCP alone deals with streams of bytes with no inherent concept of a message. Additionally, WebSocket enables streams of messages on top of TCP. The communications are usually done over TCP port number 443 (or 80 in the case of unsecured connections), which is beneficial for environments that block non-web Internet connections using a firewall. In this way, a two-way ongoing conversation can take place between the client and the server. This is made possible by providing a standardized way for the server to send content to the client without being first requested by the client, and allowing messages to be passed back and forth while keeping the connection open. The WebSocket protocol enables full-duplex interaction between a web browser (or other client application) and a web server with lower overhead than half-duplex alternatives such as HTTP polling, facilitating real-time data transfer from and to the server. To achieve compatibility, the WebSocket handshake uses the HTTP Upgrade header to change from the HTTP protocol to the WebSocket protocol. Although they are different, RFC 6455 states that WebSocket 'is designed to work over HTTP ports 443 and 80 as well as to support HTTP proxies and intermediaries', thus making it compatible with HTTP.

Both protocols are located at layer 7 in the OSI model and depend on TCP at layer 4.

WebSocket is distinct from the Hypertext Transfer Protocol (HTTP) used to serve most webpages.

It is a living standard maintained by the WHATWG and a successor to The WebSocket API from the W3C. The current specification allowing web applications to use this protocol is known as WebSockets. The WebSocket protocol was standardized by the IETF as RFC 6455 in 2011.

WebSocket is a computer communications protocol, providing simultaneous two-way communication channels over a single Transmission Control Protocol (TCP) connection. A diagram describing a connection using WebSocket

Download the new version for android Final Draft 12.0.9.110