The use of mobile devices is increasing and widening. Not only are smartphones and tablets connected to internet but also automation devices, car systems, and more. Even though these devices are increasingly powerful, they still have constraints of limited battery life and intermittent network availability. With the messaging technology covered in this practical guide, you'll learn how to apply protocols that use the most critical resources (network bandwidth and memory usage) efficiently--and guarantee that the data will be effectively delivered even in the event of loss of network connectivity. Applications are increasingly running inside a web browser or using Web technology. For these applications too, the messaging concepts in this book can make them more efficient and responsive.