Which technology reduces end-user latency by caching data closer to users?

Which technology reduces end-user latency by caching data closer to users?

• A. Content Delivery Network stores copies of data closer to users to reduce latency.
• B. A caching solution that stores data only in a single data center.
• C. A protocol for secure communications between clients and servers.
• D. A routine for archiving old data to cold storage.

Answer: (A)

Caching data at locations near users to cut response times is what a Content Delivery Network does. A CDN places copies of web content on edge servers spread across many geographic locations. When someone requests that content, it can be served from the nearest edge server rather than traveling all the way to the origin server. This shorter path reduces travel time, lowers the chance of congestion, and speeds up load times for end users. It also offloads traffic from the origin, improving scalability during traffic spikes. This approach is especially effective for globally accessed sites, streaming media, and large downloads.

The other options don’t fit because storing cached data in a single data center keeps remote users far from the cache, offering little latency benefit. A protocol for secure communications focuses on encryption, not caching. Archiving data to cold storage is about long-term retention and cost-optimized storage, not reducing end-user latency.