Yaroslav Basovskyy thinks this is interesting: Correct: A web service is a distinct tier of your application that can host one or more layers. From Chapter 1. Design Windows Store apps from Exam Ref 70-481: Essentials of Developing Windows Store Apps Using HTML5 and JavaScript by Wouter de Kort Publisher: Microsoft Press Released: July 2014 Note Here is a mistake. The answer is from another question. Share this highlight http://www.safaribooksonline.com/a/exam-ref-70-481/39023/ Twitter Facebook Google Plus Email Get Instant Access Now Start a Free Trial Have an account? Sign in. Minimise Unlock the rest of this book and 30,000 other books and videos By clicking this box, you confirm that you have read and agree to the terms and conditions of our Membership Agreement, and you understand that when your trial period ends, you will be required to provide billing information if you wish to continue using the service. Unlock the rest of this book Start a Free 10-Day Trial loading Learn about Safari for Business Have an account? Sign in.