How can you optimize costs when using CloudFront for content delivery?.

To optimize costs when using Amazon CloudFront, several approaches can be applied:

• Caching: increase the TTL of cached content to reduce requests to the origin server.
• Choosing the right regions: configure the distribution to serve traffic from regions with lower rates.
• Content size optimization: compress files (e.g., gzip, Brotli) to reduce data transfer volume.
• Using Origin Shield: an additional caching layer that reduces load on the origin and lowers costs.
• Monitoring and analysis: use AWS Cost Explorer and CloudFront Reports to identify peak loads and optimize settings.

Example of TTL configuration in CloudFront:

{
  "DefaultCacheBehavior": {
    "MinTTL": 3600,
    "DefaultTTL": 86400,
    "MaxTTL": 31536000
  }
}