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Oracle

1Z0-997-20 · Question #144

You are working on the migration of the web application infrastructure of your company from on- premises to Oracle Cloud Infrastructure. You need to ensure that the DNS cache entries of external…

The correct answer is E. Reduce the TTL of the DNS records before the switch. See the full explanation below for the reasoning.

Question

You are working on the migration of the web application infrastructure of your company from on- premises to Oracle Cloud Infrastructure. You need to ensure that the DNS cache entries of external clients will not direct them to the on-premises infrastructure after switching to the new infrastructure. Which of the following options will minimize this problem?

Options

  • AReduce the TTL of the DNS records after the switch.
  • BDNS changes propagate fast enough that it is not necessary to take any action.
  • CIncrease the TTL of the DNS records before the switch.
  • DIncrease the TTL of the DNS records after the switch.
  • EReduce the TTL of the DNS records before the switch.

How the community answered

(49 responses)
  • A
    2% (1)
  • B
    2% (1)
  • C
    6% (3)
  • D
    12% (6)
  • E
    78% (38)

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