docs/examples/bookinfo/#apply-default-destination-rules>apply the default destination rules</a>, and
<a href=/v1.8/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</code> microservice. You will