AWS Shield, a managed Distributed Delusion of Service (DDoS), protection service, protects applications that run on AWS. AWS Shield provides automatic inline mitigations and detection that ensure application uptime and minimize latency. AWS Support is not required to use AWS Shield to provide DDoS protection. AWS Shield has two levels: Advanced and Standard. All AWS customers receive the automatic protections of AWS Shield Standard at no additional cost. AWS Shield Standard protects your web site and applications against the most common, frequent, and frequently occurring network or transport layer DDoS attacks. AWS Shield Standard is combined with Amazon CloudFront or Amazon Route 53 to provide comprehensive availability protection against all known infrastructure (Layer 3 & 4) attacks.