# Support

Here are some resources to help you understand and use Istio:

- For in-depth information about how to use Istio, visit [istio.io](https://istio.io)
- To ask questions and get assistance from our community, visit [GitHub Discussions](https://github.com/istio/istio/discussions)

Daniel Frederick Crisman <******@****.***> 1679759635 +0000

   * requests on the same socket, and server-push. HTTP/1.1 semantics are layered on SPDY/3.
   *
   * Current versions of OkHttp do not support this protocol.
   */
  @Deprecated("OkHttp has dropped support for SPDY. Prefer {@link #HTTP_2}.")
  SPDY_3("spdy/3.1"),

  /**
   * The IETF's binary-framed protocol that includes header compression, multiplexing multiple

#### Various

   Core changes:

  * Support for load balancers with source ranges

#### AWS

Core changes:

  * Support for ELBs with complex configurations: better subnet selection with
multiple subnets, and internal ELBs
  * Support for VPCs with private dns names
  * Multiple fixes to EBS volume mounting code for robustness, and to support
mounting the full number of AWS recommended volumes.

## Security Bulletins

Information about previous Istio vulnerabilities can be found on the
[Security Bulletins] page.

[Support Announcements]: https://istio.io/news/support/
[Istio Security Vulnerabilities]: https://istio.io/about/security-vulnerabilities/
[Security Bulletins]: https://istio.io/news/security/

This platform does not provide special support for a particular language or ecosystem.

#### JVM platform

This is a platform that builds on the core and software platforms to add support for developing software that runs on the JVM.
This includes software that is implemented using Java, Kotlin or some other JVM language.

This platform provides specific support for Java, Groovy and Scala, and includes the foojay toolchain plugin. 

contact_links:
  - name: Support Request
    url: https://discuss.kubernetes.io

has been replaced with a new synthetic header, `OkHttp-Selected-Protocol`.

##### Changes

 * New: Support for `HTTP-draft-09/2.0`.
 * New: Support for `spdy/3.1`. Dropped support for `spdy/3`.
 * New: Use ALPN on Android platforms that support it (4.4+)
 * New: CacheControl model and parser.
 * New: Protocol selection in MockWebServer.

@GwtCompatible
public enum IteratorFeature {
  /** Support for {@link Iterator#remove()}. */
  SUPPORTS_REMOVE,
  /**
   * Support for {@link ListIterator#add(Object)}; ignored for plain {@link Iterator}
   * implementations.
   */
  SUPPORTS_ADD,
  /**
   * Support for {@link ListIterator#set(Object)}; ignored for plain {@link Iterator}
   * implementations.
   */
  SUPPORTS_SET;

  /**

@GwtCompatible
public enum IteratorFeature {
  /** Support for {@link Iterator#remove()}. */
  SUPPORTS_REMOVE,
  /**
   * Support for {@link ListIterator#add(Object)}; ignored for plain {@link Iterator}
   * implementations.
   */
  SUPPORTS_ADD,
  /**
   * Support for {@link ListIterator#set(Object)}; ignored for plain {@link Iterator}
   * implementations.
   */
  SUPPORTS_SET;

  /**