Question

After making changes to a record set in a Route53 hosted zone and saving accordingly, an administrator immediately attempts to test for the new settings. All the attempts are unsuccessful. What is the most plausible reason for this?

A. In Amazon Route53, changes in the hosted zones cannot reflect until the set Time to live (TTL) duration has lapsed.
D. Whilst logged onto the hosted zone, the administrator did not commit the changes to the respective Amazon Route53 nameservers.
C. Changes to hosted zones propagate and reflect instantly but the administrator's browser has cached content.
B. It is likely that the administrator cleared the browser and DNS cache before testing.

Answer 1

The most plausible reason for unsuccessful testing of new settings in a Route53 hosted zone is that the administrator's browser has cached the previous DNS records.

Step-by-step explanation:

The most plausible reason for the unsuccessful testing of the new settings immediately after making changes to a record set in a Route53 hosted zone is option C: Changes to hosted zones propagate and reflect instantly, but the administrator's browser has cached content.

When changes are made to a hosted zone in Route53, the changes will typically propagate to the authoritative DNS servers within a short period of time. However, the administrator's browser may have cached the previous DNS records, preventing the new settings from being tested successfully. To resolve this, the administrator should clear the browser cache or try using a different browser or a private browsing window.

It is important to note that option A is not correct because changes made to a hosted zone in Route53 can reflect even before the Time to Live (TTL) duration has lapsed. Option B is also not correct because if the changes were saved, they would be committed to the respective Amazon Route53 nameservers.