Content Delivery Networks 101

• CDNs are solving:

  • Poor and inconsistent site performance
  • Flash crowd protection
  • Availability

• CDN business model:

  • Customer is content provider
  • Value: quality of service

• CDNs are:

  • A distributed overlay network of servers (surrogates) which serve content on behalf of an origin server
  • Redirect requests via DNS global load balancing systems

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