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You want to migrate your website to a new server without downtime. How can DNS management help achieve this?

hard📝 Application Q8 of 15
AWS - Route 53
You want to migrate your website to a new server without downtime. How can DNS management help achieve this?
ABy increasing TTL to cache old IPs longer
BBy deleting all DNS records during migration
CBy removing MX records temporarily
DBy lowering TTL before migration and updating records quickly
Step-by-Step Solution
Solution:

  1. Step 1: Prepare DNS for migration

    Lowering TTL reduces cache time so changes propagate faster.

  2. Step 2: Update DNS records quickly

    After lowering TTL, update DNS to point to new server IP to avoid downtime.

  3. Final Answer:

    By lowering TTL before migration and updating records quickly -> Option D

  4. Quick Check:

    Lower TTL + update = smooth migration [OK]
Quick Trick: Lower TTL before changes for fast DNS update [OK]
Common Mistakes:
  • Deleting records causes downtime
  • Increasing TTL delays updates
  • Removing MX unrelated to web migration

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