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CDN Types

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Short overview on CDN Types

Short overview on CDN Types

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  • 1. CDN Classification Source: Limelight
  • 2. Previous CDN classification
    • Server based – Incumbents, Akamai
    • Traditional P2P
      • “ Bittorrent”-s
      • Pando Networks
    • Grid Based
    • Hybrid Architecture
      • “ Peer Assisted Streaming”
      • Joost
    Classify CDN based on delivery technology
  • 3. CDN Classification - Conventional
  • 4. Modern CDN Classification
    • Classify CDN based on
      • Who pays for the service?
      • What is the service goal?
    • not on the delivery technology
    • Content Provider CDN
    • External Service provider CDN
    • Internal Service Provider CDN
    • Application CDN
  • 5. CDN Classification - New
  • 6. Content Provider CDN
    • Goal – Assure delivery, Reduce load and delay from content providers’ sites.
    • Examples
      • Akamai
      • Limelight
    • Located – in main service provider’s POP deployed globally
    • Client - Content distributers and owners such as CNN, Hulu and “Youtube”-like sites.
  • 7. External Service providers CDN
    • Goal - Reduce EXTERNAL bandwidth cost for ISP by caching content within the ISP network.
    • Examples
      • Oversi
      • PeerApp
    • Located – in main ISP POPs
    • Equipment is PC server based or embedded
    • Clients - service providers like 012 or 014 (Israeli examples)
  • 8. Internal Service Provider CDN
    • Goal - reduce INTERNAL bandwidth load inside the service provider network by caching.
    • Used mainly in IPTV to distribute premium content (due to cost)
    • Examples: Mostly VoD service providers
      • Bitband (Motorola)
      • Velolcix (Alcatel-Lucent)
    • Located – Distributed within service provider’s network
    • Equipment is PC server based or embedded
    • Clients – IPTV service providers
  • 9. Peer based CDNs
    • Bittorrent
    • Giraffic
    • RayV