Which statement best describes the function of a CDN's edge servers?

Which statement best describes the function of a CDN's edge servers?

• A. A CDN caches content at distributed edge servers to reduce latency and improve load times.
• B. A CDN stores backups in a distant data center for disaster recovery.
• C. A CDN runs client-side scripts to optimize rendering.
• D. A CDN compresses content on the server to reduce bandwidth only.

Answer: (A)

Edge servers in a CDN exist to bring content closer to users by caching copies across many locations. When a user requests a resource, it can be served from a nearby edge server instead of traveling all the way to the origin, which cuts down the round-trip time and speeds up load times. This distributed caching also reduces load on the origin because fewer requests reach it. The other descriptions miss the central idea: backups in distant data centers are about disaster recovery, not delivery speed; running client-side scripts is about on-device optimization, not edge delivery; and while compression helps with bandwidth, the defining function of edge servers is caching content close to users, not just reducing bandwidth.

Edge servers in a CDN exist to bring content closer to users by caching copies across many locations. When a user requests a resource, it can be served from a nearby edge server instead of traveling all the way to the origin, which cuts down the round-trip time and speeds up load times. This distributed caching also reduces load on the origin because fewer requests reach it. The other descriptions miss the central idea: backups in distant data centers are about disaster recovery, not delivery speed; running client-side scripts is about on-device optimization, not edge delivery; and while compression helps with bandwidth, the defining function of edge servers is caching content close to users, not just reducing bandwidth.