> For the complete documentation index, see [llms.txt](https://karansingh.gitbook.io/aws-saa-c02/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://karansingh.gitbook.io/aws-saa-c02/security-and-encryption/shield.md).

# Shield

* Shield Standard:

  * At **no additional charge** for all AWS customers.
  * **Defends against most common and frequent network and transport layer DDoS attacks**.
  * Get particular benefit if you are using **CloudFront and Route 53**.
  * Receive **comprehensive availability protection against all known infrastructure (Layer 3 and Layer 4) attacks**.

* Shield Advanced:
  * Paid service - **Costs $3000 per month**.
  * Requires a **1-year subscription commitment**.
  * Provides additional protections for internet-facing applications running on:
    * Elastic Compute (EC2).
    * Elastic Load Balancing (ELB).
    * CloudFront.
    * Global Accelerator.
    * Route 53.
  * Available to all customers - However, to contact the **DDoS Response Team customers will need the Enterprise or Business Support levels** of AWS Premium Support.