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AWS Shield is a managed Distributed Denial of Service (DDoS) protection service that safeguards applications running on AWS. This service offers both standard and advanced tiers of protection. The standard tier is automatically included at no extra cost to safeguard against the most common and frequently occurring network and transport layer DDoS attacks, while the advanced tier provides additional protections against more sophisticated DDoS attacks and comes with 24/7 access to the AWS DDoS Response Team (DRT). AWS Shield helps ensure application availability and improve user experience by maintaining service uptime during attacks.

AWS Shield integrates seamlessly with other AWS services, such as CloudFront (Content Delivery Network), Route 53 (Domain Name System), and AWS Web Application Firewall (WAF). Key features include real-time attack visibility, near real-time detection and mitigation of DDoS attacks, and detailed post-attack diagnostics. Pricing for the advanced tier includes a monthly fee along with usage-based charges for additional AWS resources used during an attack. Teams choose AWS Shield for its robust security features, comprehensive integration with existing AWS resources, and the reliability of AWS infrastructure.