lication</a>, <a href=/v1.7/docs/examples/bookinfo/#apply-default-destination-rules>apply the default destination rules</a>, and <a href=/v1.7/docs/tasks/traffic-management/egress/egress-control/#change-to-the-blocking-by-default-policy>change Istio to the blocking-egress-by-default policy</a>.</p><p>This application uses the <code>ratings</code> microservice to fetch
book ratings, a number between 1 and 5. The ratings are displayed as stars for each review. There are several versions
of the <code>ratings</