Using a content delivery network (CDN) optimizes the delivery of web content and media by caching the content in multiple proxy servers located close to end-users. This reduces the load on the origin server, decreases latency, and improves the user experience by ensuring that users receive data from the geographically nearest node. Server clustering mainly enhances load balancing within data centers and does not necessarily optimize global content delivery. Data compression can reduce the size of the transferred data, but it alone does not address issues such as latency for geographically distributed users. Increased bandwidth merely expands the data transmission capability and may still result in delays if data must travel large distances.