3.1 Introduction3.2 Background3.3 Two Different Eyeball ISPs3.4 Three Different Congestion Points Per ISP, Fixed Caching Factors3.5 One Congestion Point Per ISP, Fixed Caching Factors3.6 Three Different Congestion Points Per ISP, Fixed Caching Factors, Multiple Providers of One of the Types3.7 Numerical Experiments3.8 Future WorkReferences