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A content delivery network reduces storage cost and latency by

  • A.caching objects near the users
  • B.compressing the data at the origin
  • C.replicating the whole store everywhere
  • D.removing any need for an origin at all

Answer: A

Repeated reads are served from the cache rather than from the origin, cutting both egress and latency. The origin remains authoritative and must still exist. Repeated reads never reach it. Egress and latency both fall.

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