OCI 1Z0-1123-25 glossary of assessments, landing zones, cutover planning, and migration terms.
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Use this glossary to clean up high-confusion OCI migration terms before you go back into mixed sets. On this exam, terminology mistakes usually hide a sequencing or cutover mistake.
High-value terms
Term
What it means here
Why it matters on the exam
Cutover
the planned point where production traffic or responsibility shifts to the new environment
many questions hinge on whether the switch is actually ready
Dependency map
the record of systems, services, and sequences that affect migration order
weak dependency thinking breaks otherwise good plans
Downtime window
the amount of unavailable time a migration plan can tolerate
this often drives online vs offline choices
FastConnect
OCI private connectivity option for linking external environments into OCI
common tie-break against VPN
Rollback path
the recovery option that returns operations to the old environment if cutover fails
rollback discipline is a strong-answer marker
Staging
a temporary holding or preparation step before the final move
staging is not the final switch
Transfer path
the method used to move data or workloads from source to destination
the path is not the same as validation
Validation step
the checkpoint that confirms readiness before cutover
validation is where many weak plans fail
VCN
OCI’s private network boundary used to place migrated workloads
many migration questions still hinge on network placement
Wave migration
moving applications or datasets in grouped phases instead of all at once
waves often reduce risk and shrink blast radius
Common confusion pairs
Pair
Clean separation
Staging vs cutover
staging prepares the move, cutover is the final switch
Validation vs rollback
validation checks readiness, rollback reverses a failed or unsafe move
Connectivity design vs migration tool
connectivity design creates the path, the migration tool moves or syncs the workload
Database migration vs general data transfer
database migration understands database-specific movement, general transfer handles broader file or object movement
Single-step move vs wave migration
a single-step move changes everything at once, wave migration sequences groups to reduce risk
Downtime window vs stabilization period
downtime window is tolerated outage, stabilization is the monitored period after cutover
Inventory vs dependency map
inventory lists what exists, dependency map explains how components affect sequence and risk
Fast recall anchors
If you see…
Think…
final production switch
cutover
“can we go back?”
rollback path
grouped movement to reduce blast radius
wave migration
“is it safe to proceed?”
validation step
If three terms blur together
Terms
Short reset
staging, transfer, cutover
staging prepares, transfer moves, cutover switches production responsibility
validation, rollback, stabilization
validation proves readiness, rollback reverses a failed move, stabilization watches the new state after switch
VPN, FastConnect, DRG
VPN and FastConnect are private connectivity paths, DRG is the routing hub in broader designs
inventory, dependency map, wave
inventory shows assets, dependency map shows order constraints, waves group the migration sequence