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The most difficult cloud network decision to reverse later is usually

  • A.the security group rules applied
  • B.the type of load balancer used
  • C.the DNS records that were created
  • D.the address range chosen

Answer: D

Correct answer: the address range chosen

Security group rules, load balancer types and DNS records can all be changed in minutes. The VPC address range cannot: it is fixed at creation, everything is numbered out of it, and changing it means rebuilding the network and re-addressing what runs in it. Choosing a range too small, or one that overlaps a range the organisation may later need to peer with, is a decision that has to be lived with.

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