Web Socket is a full duplex communications protocol over a single TCP connection. It is standardized by IETF as RFC 6455. It is designed to work over HTTP ports 80 & 443 including HTTP proxies. WebSocket handshake uses the HTTP Upgrade header to switch from the HTTP protocol to WebSocket protocol. WebSocket protocol enables interaction between a web client and a web server with lower overheads, facilitating two way, ongoing real-time data transfer from and to the server.