What is a primary benefit of CDNs for content delivery?

• A. Increase encryption
• B. Increase bandwidth
• C. Increase server count
• D. Reduce latency by caching at edge

Answer: (D)

Content delivery networks improve performance by placing copies of content at edge locations around the world. When a user requests a resource, the CDN serves it from the closest edge server, cutting the distance data must travel and the number of network hops. That proximity directly lowers round-trip time, delivering faster load times. This edge caching and nearby delivery is the primary benefit you experience with a CDN.

Encryption is a security feature the CDN can support, not the main performance advantage. CDNs can also help with bandwidth efficiency and scalability, and they use many edge servers, but the core user benefit is the reduction in latency from delivering content from nearby locations.