# What is the purpose of Istio's Sidecar resource?

Istio, Medium (Advanced), Advanced Configuration. https://k8wiz.com/uquiz/what-is-the-purpose-of-istios-sidecar-resource

- A. To inject sidecar containers
- B. To configure which services a sidecar can see
- C. To define sidecar behavior
- D. To authenticate sidecars

**Answer:** To configure which services a sidecar can see

**Explanation:** The Sidecar resource in Istio is used to configure which services a sidecar can see. It allows you to limit the services that a sidecar proxy is aware of, which can improve performance by reducing the amount of configuration sent to the proxy.