o-based application."></a></div><figcaption>Istio architecture in sidecar mode</figcaption></figure><h2 id=components>Components</h2><p>The following sections provide a brief overview of each of Istio&rsquo;s core components.</p><h3 id=envoy>Envoy</h3><p>Istio uses an extended version of the
<a href=https://www.envoyproxy.io/>Envoy</a> proxy. Envoy is a high-performance
proxy developed in C++ to mediate all inbound and outbound traffic for all
services in the service mesh.
Envoy proxies are the only Istio c