200 on-prem VMs must reach AWS in 6 months. The team wants minimal app changes now, then modernize later. Which migration approach and service fit?
A.Refactor each app to Lambda during migration
Refactoring 200 apps in 6 months is unrealistic and mixes two migration strategies.
B.Rehost using AWS Application Migration Service (MGN)
Correct. MGN = block-level replication + automated test/cutover instances.
C.Repurchase: replace all apps with SaaS equivalents
Repurchase means replacing apps — a business decision far beyond a lift-and-shift mandate.
D.Manually rebuild AMIs and copy them via DataSync
AMI exports handle single servers and lose continuous replication/cutover orchestration.
Why this answer
MGN continuously replicates source servers into AWS with automated conversion and cutover orchestration — the standard rehost-at-scale tool. Refactoring mid-migration blows the timeline; modernize as a second phase.
Correct answer: B · Last reviewed 2026-10-26
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