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How can we check the subprotocol being used by the client?

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How can we check the subprotocol being used by the client? (a) subprotocol property (b) protocol property (c) clientprotocol property (d) client property I got this question during an online exam. My question is based upon Web Sockets topic in division Sockets of JavaScript Select the correct answer from above options JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

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The correct choice is (b) protocol property Explanation: A WebSocket is a standard bidirectional TCP socket between the client and the server. The socket starts out as an HTTP connection and then “Upgrades” to a TCP socket after an HTTP handshake. Once the connection is established, the client can determine which subprotocol is in use by checking the protocol property of the socket.

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