Caching and Content Distribution Networks

Which statements describe the motivation for CDNs? (2 correct answers). Reduce latency for end users. Centralize all content in one data center. Decrease server overload. Eliminate the need for DNS. Increase network congestion.

Which problems exist in the traditional client/server model? (3 correct answers). Single point of failure. Automatic load balancing. Flash crowd effect. High scalability by default. Server overload.

Which characteristics describe Zipf (power-law) distribution? (2 correct answers). A small number of objects receive most requests. All objects are accessed equally. Popularity is highly skewed. Traffic is random. No object dominates.