Behavior for how the WebSocket should operate. <p> This dictated by the <a href="https://tools.ietf.org/html/rfc6455">RFC 6455</a> spec in various places, where certain behavior must be performed depending on operation as a <a href="https://tools.ietf.org/html/rfc6455#section-4.1">CLIENT</a> vs a <a href="https://tools.ietf.org/html/rfc6455#section-4.2">SERVER</a>