1. Overlay Architecture and API Fang Yu Noah Treuhaft Takashi Suzuki Matthew Caesar

2. Origin Server Client Proxy Server DNS Server 3A 1 2 3 4 3B Liveness & Load Measurements Network Measurements Akamai Architecture Overlay Layer ISP Networks

3. DPC IP NW Alarms Performance Accounting Capabilities Overlay Agg –SLA –Negotiation, –Enhanced –Measurements –Charges Provisioning »Bandwidth/Latency »Computation »Storage Bcast Failure Restoration Application Requirements Alarms Performance Accounting Capabilities Charges

4. Billing ISP Overlay Network Distributed Service Application Service User $ $ $ $ Point to Point Connection Wide Area Connection Bandwidth Latency Reliability Traffic aggregation Monitoring Cost infor Node selection Line Selection

5. ON Billing between Overlay Networks Asia Europe America Overlay network Game Company Broker(Distributed Service) 3G Access ISP Monitor Traffic Bill Mgr ON Mgr

6. Overlay in authentication chain Application Provider Access Network Provider Backend Authentication Infrastructure.NET PASSPORT SUN LIBERTY NW Operator Credit Card Company Overlay Provider Network access request Application service request Overlay service request Client authentication Client authentication ASP authentication Service

7. Overlay in authentication chain ~request redirection Application Provider Backend Authentication Infrastructure.NET PASSPORT SUN LIBERTY NW Operator Credit Card Company Overlay Provider Network access request Client authentication Client authentication ASP authentication Redirect Application service request Service request Access Network Provider

8. Assumption End user uses overlay service only through application service provider End user pays for application, not for overlay service Overlay provider gets revenue only from application provider Overlay provider must authenticate ASP, or verify end user owns valid token issued by ASP log service provided  Number of byte, hit, etc …