AP Networking Troubleshooting Methods and Documentation Practice Test

1. The specific failed task, affected endpoint and observed symptom
2. The first tool that happens to be available
3. The last saved configuration without a task description
4. The user's preferred replacement equipment

Correct answer: A. The specific failed task, affected endpoint and observed symptom

A concrete symptom makes the investigation testable. Broad labels do not identify which task, path or stage failed.

1. To assume all earlier events are unrelated
2. To place symptoms and relevant changes on a timeline
3. To select the last change as the cause without comparison
4. To use report time as the exact failure start

Correct answer: B. To place symptoms and relevant changes on a timeline

Timing helps compare plausible causes and evidence. Temporal proximity is a lead, not proof of causation.

1. Which team normally receives the most tickets
2. Which network component has the oldest warranty
3. Who, where and which tasks are affected or unaffected
4. Which replacement model should be ordered first

Correct answer: C. Who, where and which tasks are affected or unaffected

Affected and unaffected comparisons narrow the investigation. A network-wide remedy should not follow automatically from one endpoint's complaint.

1. A remedy chosen before defining the symptom
2. A final cause inferred from the first alert
3. A testable explanation for the observed failure
4. A plausible explanation that needs no predicted result

Correct answer: C. A testable explanation for the observed failure

A hypothesis predicts observable outcomes. It should be revised when results do not support it.

1. To ensure any successful combined edit proves every part necessary
2. To make an unchanged result conclusive without checking application
3. To make the effect of that change interpretable
4. To eliminate the need to record effective settings

Correct answer: C. To make the effect of that change interpretable

Isolating variables helps attribute outcomes. It does not remove the need for controls, timing context or further verification.

1. The earlier measurements describe a comparable task, context and workload
2. The earlier test used any available source network
3. The earlier values are simply the fastest recorded
4. The earlier report contains only advertised link speeds

Correct answer: A. The earlier measurements describe a comparable task, context and workload

A reference is useful when its conditions match the comparison. Otherwise differences may reflect workload or test design rather than a new fault.

1. So a failing result can be treated as a permanent device property
2. So another technician can interpret and reproduce the observation
3. So a passing command can stand in for every user task
4. So old output can be reused after the target changes

Correct answer: B. So another technician can interpret and reproduce the observation

An output without target, source or timing can be misattributed. Context makes the evidence reviewable.

1. Only that the original alert stops displaying
2. Only that the edited value appears in the management console
3. The intended task and relevant limits that must be satisfied
4. Only that one unrelated probe succeeds

Correct answer: C. The intended task and relevant limits that must be satisfied

A configuration action is not its outcome. Define the user task and restrictions that verification must demonstrate.

1. Keep only a screenshot of the proposed new setting
2. Save the prior state and verify an approved recovery access path before the edit
3. Write restore settings without checking how to reach the device
4. Assume remote access will survive every change

Correct answer: B. Save the prior state and verify an approved recovery access path before the edit

Reversal needs both usable prior configuration and a reachable supported recovery method. A rollback instruction is ineffective if the operator cannot execute it.

1. A reboot guarantees the original logs remain intact
2. A reboot can remove transient state needed to explain the failure
3. A reboot establishes permanent recovery after one success
4. A reboot isolates the faulty component by itself

Correct answer: B. A reboot can remove transient state needed to explain the failure

Restoration can be useful, but state may disappear. Capture relevant evidence within the operational constraints before changing it.

1. The Internet is slow, with no time or task
2. Room 204 laptops cannot open the assigned HTTPS page from Wi-Fi since 09:20
3. Users cannot work, with no attachment or target
4. One device is broken, with no observed test

Correct answer: B. Room 204 laptops cannot open the assigned HTTPS page from Wi-Fi since 09:20

The concrete statement includes task, cohort, attachment and timing. It can be compared with a known working condition.

1. An observation records what was seen; a conclusion interprets its meaning
2. An observation names the root cause without inference
3. An interpretation can be recorded as direct packet evidence
4. A conclusion cannot have uncertainty

Correct answer: A. An observation records what was seen; a conclusion interprets its meaning

Keep direct evidence and interpretation separate. This helps reviewers assess how much the evidence actually supports.

1. They prove every alternative cause impossible
2. They can be omitted once any workaround succeeds
3. They show what was tested and prevent unnecessary repetition
4. They should be summarized as all tests passed

Correct answer: C. They show what was tested and prevent unnecessary repetition

Negative results can narrow hypotheses when their scope is clear. They are part of the investigation rather than discarded history.

1. The required HTTPS action completed
2. The gateway's routing policy was correct
3. Physical link indication was present at that time
4. The endpoint's resolver returned the intended data

Correct answer: C. Physical link indication was present at that time

Each check has a scope. A link indication does not establish later protocol or application outcomes.

1. Relevant differences can help isolate the failing condition
2. It rules out every shared upstream fault
3. It removes the need to match task and timing
4. It proves the failed endpoint has the same effective configuration

Correct answer: A. Relevant differences can help isolate the failing condition

A useful comparison matches the task while exposing differences in attachment, settings, identity or time.

1. Only a statement that the edit saved successfully
2. The motivating symptom and timestamped verification of the required task
3. Only the operator’s assumption that it should work
4. Only the new gateway repeated in bold

Correct answer: B. The motivating symptom and timestamped verification of the required task

The record must connect the edit to the problem and measured result. This supports review without requiring the next technician to guess its purpose.

1. A screenshot without source or collection time
2. A general instruction to reset network settings
3. The same tool name without its target or options
4. Clear source, target, procedure, conditions and recorded result

Correct answer: D. Clear source, target, procedure, conditions and recorded result

Reproduction needs enough context to run an equivalent test. A vague action list cannot reliably produce the same evidence.

1. When evidence or authority requirements place the next action outside the current scope
2. Only after repeating all previous tests without new evidence
3. Only after making changes outside the current authority
4. Only when the incident's duration exceeds an arbitrary threshold

Correct answer: A. When evidence or authority requirements place the next action outside the current scope

Escalation should carry the evidence already gathered and the specific next decision needed. It is a handoff, not a restart of the investigation.

1. Unredacted tokens make routine evidence safer to review
2. Secrets prove which account was intended even when context is enough
3. Reusable credentials are needed for every handoff
4. They are not needed for routine review and can expose access if copied

Correct answer: D. They are not needed for routine review and can expose access if copied

Record appropriate identity context without publishing reusable secrets. Evidence should support diagnosis without unnecessary exposure.

1. Proof that the specific underlying cause has been identified
2. The act of saving a proposed configuration
3. A passing infrastructure probe regardless of the required task
4. Returning the required service to acceptable operation

Correct answer: D. Returning the required service to acceptable operation

Restoration is an outcome. The cause can remain uncertain, so document what recovered and what still needs investigation.

1. As a temporary measure with scope, limits and follow-up ownership
2. As a change that requires no owner or expiration
3. As a permanent correction because the first test passed
4. As justification to close unresolved root-cause work

Correct answer: A. As a temporary measure with scope, limits and follow-up ownership

A workaround can be useful while retaining unresolved risk and investigation work. Label its limits plainly.

1. It substitutes for recording the collection point
2. It shows relevant attachments and dependencies for the failed task
3. It proves each dependency is currently operational
4. It confirms effective configuration without observation

Correct answer: B. It shows relevant attachments and dependencies for the failed task

A diagram helps interpret where observations were collected. Mark intended versus observed paths rather than treating the drawing as proof.

1. Repeat the defined acceptance tests and record the outcome
2. Wait for complaints rather than run the defined test
3. Repeat only an unrelated infrastructure probe
4. Close the ticket because the setting was saved

Correct answer: A. Repeat the defined acceptance tests and record the outcome

Verification connects the change to task recovery. Preserve the before and after evidence.

1. To let follow-up wait without a deadline
2. To make the next action and follow-up accountable
3. To substitute assignment for service verification
4. To establish that owner's preferred hypothesis as the cause

Correct answer: B. To make the next action and follow-up accountable

Ownership keeps unresolved work from disappearing at handoff. It does not substitute for technical proof.

1. Only the technician's administrative access
2. Only whether a local link icon is green
3. Only one unrelated public page
4. The original task, representative affected users and relevant constraints

Correct answer: D. The original task, representative affected users and relevant constraints

Test what originally failed and the meaningful scope of recovery. One unrelated success can conceal remaining affected cases.

1. Check connection delivery to the selected address and port
2. Treat resolver success as application success
3. Rebuild the zone despite the correct queried answer
4. Change the client's address before tracing the selected connection

Correct answer: A. Check connection delivery to the selected address and port

The lookup establishes one prerequisite for that query. Continue with the actual selected endpoint and transport path.

1. Only the intended topology diagram without effective paths
2. Only whether any Internet site works
3. Only their nominal device models
4. Their effective attachments, policies and service path for the same task and time

Correct answer: D. Their effective attachments, policies and service path for the same task and time

Cohort differences can locate a shared boundary. Match task and conditions before attributing failure to a component.

1. The combined intervention does not isolate which change caused recovery
2. Every edit has been proven separately necessary
3. The last edit must be the sole cause
4. No before-and-after evidence is useful

Correct answer: A. The combined intervention does not isolate which change caused recovery

Restoration is observed, but causal attribution is weak when multiple variables change. Review or test safely if a precise cause is needed.

1. Only a cached answer from an unrelated resolver
2. Only whether the server's process exists
3. Only an intended path on a diagram
4. Collection visibility and observations along the server/return path

Correct answer: D. Collection visibility and observations along the server/return path

No reply in one view can result from filtering, routing, collection loss or actual nonresponse. Establish visibility and bracket the failure.

1. Compare different versions under unrelated load
2. Compare the failing behavior with a controlled supported rollback or equivalent unaffected version
3. Repeat the failing task without checking the effective version
4. Assume a scheduled event proves the mechanism

Correct answer: B. Compare the failing behavior with a controlled supported rollback or equivalent unaffected version

A controlled comparison can separate version effects from coincident changes. Use supported procedures and maintain a clear rollback scope.

1. The test cannot be tied to a meaningful target or prerequisite
2. Evidence that every protocol failed
3. Proof that the default gateway failed
4. A complete test of the original application

Correct answer: A. The test cannot be tied to a meaningful target or prerequisite

Without source, destination, timing and result details, the failed test has little diagnostic scope. Reproduce the intended check with context.

1. The prohibited-access boundary that must remain intact
2. Whether the administrative test was fast
3. Whether the interface's display name changed
4. Whether the console accepted the new value

Correct answer: A. The prohibited-access boundary that must remain intact

Recovery must preserve relevant restrictions. Test required access and protected negative cases after the correction.

1. Testing a lighter workload and claiming peak recovery
2. Testing only physical link state
3. Testing only one idle endpoint late at night
4. Testing from a context that cannot reproduce the trigger

Correct answer: C. Testing only one idle endpoint late at night

The symptom's conditions belong in acceptance testing. An idle success may not exercise the triggering workload.

1. A representative sample proven by count alone
2. A guaranteed complete outage
3. Reported or sampled scope from verified population-wide impact
4. A guaranteed limit of exactly five affected users

Correct answer: C. Reported or sampled scope from verified population-wide impact

State the evidence behind scope claims. Expand sampling or telemetry when the broader conclusion matters.

1. The action makes earlier observations irrelevant
2. The action guarantees causal isolation
3. The action preserves every transient entry
4. The action can erase the state that distinguishes the hypotheses

Correct answer: D. The action can erase the state that distinguishes the hypotheses

A cache clear can be a useful test but changes conditions. Record relevant state first when feasible and interpret the resulting difference narrowly.

1. The shared application is unavailable everywhere
2. The laptop is definitively faulty
3. The port's physical hardware is definitively faulty
4. The attachment/path difference deserves investigation

Correct answer: D. The attachment/path difference deserves investigation

Holding the endpoint constant helps isolate attachment context. Check VLAN, policy and path rather than claiming a specific failed component without evidence.

1. A user-specific identity or authorization condition
2. A universal uplink hardware failure
3. A fault specific to one endpoint's NIC
4. A DNS outage that must affect every identity

Correct answer: A. A user-specific identity or authorization condition

The controlled identity comparison points toward user context. Verify the actual denial and effective permissions before editing access.

1. The motherboard was proven defective
2. The same symptom cannot recur
3. The resolver was proven defective
4. Recovery followed reboot; the specific cause remains unconfirmed

Correct answer: D. Recovery followed reboot; the specific cause remains unconfirmed

Describe the observed intervention and outcome accurately. An unexplained reset is weaker causal evidence than a diagnosed mechanism.

1. To compare events from systems that otherwise display different local times
2. To replace flow correlation with time alone
3. To omit clock uncertainty from the record
4. To make every event's displayed order conclusive despite drift

Correct answer: A. To compare events from systems that otherwise display different local times

Time interpretation can change event ordering. Preserve offsets and note clock uncertainty rather than silently align unrelated timestamps.

1. Only whether an address responds to ping
2. Only whether the direct address has a PTR record
3. Only whether the new test uses the same cable
4. Name resolution plus hostname-dependent TLS, virtual hosting or application behavior

Correct answer: D. Name resolution plus hostname-dependent TLS, virtual hosting or application behavior

Changing the hostname can change more than resolution. Keep application identity and request semantics comparable.

1. That DNS worked after the combined intervention
2. That the user stopped complaining immediately
3. A repeatable controlled comparison or cable/port evidence that isolates it
4. That the replacement was newer

Correct answer: C. A repeatable controlled comparison or cable/port evidence that isolates it

Replacement can also reseat connectors or change ports. State what was isolated and what remains uncertain.

1. Repeat the same test until one transient success appears
2. Apply several speculative fixes together
3. Choose a discriminating test based on the current hypothesis and visibility gap
4. Choose an unrelated test with no prediction

Correct answer: C. Choose a discriminating test based on the current hypothesis and visibility gap

Repeated identical tests may confirm persistence but add little explanation. Select the next observation that separates plausible causes.

1. The endpoint's actual address at the incident and test times
2. That a hostname never changes its address
3. That yesterday's address is valid on all interfaces
4. That the old lease permanently identifies the current endpoint

Correct answer: A. The endpoint's actual address at the incident and test times

Time-bound identity matters when addresses are reassigned. Correlate effective configuration and lease or endpoint history.

1. It proves the original user's role has the same permission
2. It does not establish the student's path and policy outcome
3. It establishes the failed endpoint's current outcome
4. It proves all source networks take identical paths

Correct answer: B. It does not establish the student's path and policy outcome

Source context is part of the experiment. Repeat from a representative affected attachment and identity.

1. Keep the broad bypass because restoration is the only requirement
2. Verify only unrestricted access from an admin host
3. Remove the original security condition from acceptance
4. Identify a scoped supported correction and verify required protections

Correct answer: D. Identify a scoped supported correction and verify required protections

A diagnostic bypass can suggest a boundary without justifying a permanent unrestricted configuration. Restore or correct controls to meet the requirement.

1. An attachment count without interpretation
2. A conclusion with no supporting context
3. A concise symptom, evidence with context, tested hypotheses, current state and next decision
4. A statement that everything was tried

Correct answer: C. A concise symptom, evidence with context, tested hypotheses, current state and next decision

The next technician needs a navigable account of the investigation. Preserve raw artifacts, but explain their relevant meaning and limitations.

1. Recovery is preliminary; exercise the intermittent conditions with appropriate observation
2. A single success establishes permanent recovery
3. Intermittent failures never need a defined observation window
4. The failed sample can be omitted from the record

Correct answer: A. Recovery is preliminary; exercise the intermittent conditions with appropriate observation

Verification should match the failure's recurrence pattern. Choose a reasonable observation period and representative triggers.

1. A later edit can make the artifacts describe different network states
2. Configuration changes cannot alter artifact meaning
3. The final diagram proves every earlier trace followed it
4. Every saved console setting is instantly effective

Correct answer: A. A later edit can make the artifacts describe different network states

Evidence must be tied to the state under test. Version and time avoid mixing intended, prior and effective configurations.

1. An assumption of unchanged production capacity
2. The degraded limits, verified workload and remaining follow-up
3. Only the primary link's nominal speed
4. Only one idle ping over the backup

Correct answer: B. The degraded limits, verified workload and remaining follow-up

Restoration under a degraded condition has limits. Document what works and the demand it can support.

1. Proof that the original issue was transient
2. A completed task outcome
3. Evidence of the defined service outcome or an explicit pending verification status
4. A verified repair mechanism

Correct answer: C. Evidence of the defined service outcome or an explicit pending verification status

User availability is not task recovery. Use approved representative verification or keep the unresolved acceptance step visible.

1. The report timestamp is always the exact outage start
2. The firewall cannot have contributed at any later time
3. The edit necessarily caused the earlier event
4. It contradicts that initiation timeline unless timestamp accuracy or a separate earlier change explains it

Correct answer: D. It contradicts that initiation timeline unless timestamp accuracy or a separate earlier change explains it

A cause must fit the observed temporal order. Check clock confidence and distinguish initiating cause from a change that worsened an existing fault.

1. That network context changed
2. That attachment and policy require comparison
3. That port A's physical hardware alone caused the failure
4. That the two outcomes differed

Correct answer: C. That port A's physical hardware alone caused the failure

The move changed multiple relevant conditions. A same-context comparison or further evidence is needed to isolate hardware.

1. The public answer proves the private zone is wrong
2. The replacement resolver may not serve the required private namespace or view
3. Encryption guarantees the replacement resolver has the required private data
4. A different response isolates only server hardware

Correct answer: B. The replacement resolver may not serve the required private namespace or view

Changing resolver context changes available data and policy. Design a comparison that preserves the required namespace semantics.

1. The displayed order proves causation
2. The system with the later timezone label failed later
3. Their ordering is uncertain until clock offsets or stronger correlation are established
4. The first copied log entry must be the initiating event

Correct answer: C. Their ordering is uncertain until clock offsets or stronger correlation are established

Clock uncertainty is larger than the event separation. Avoid a precise causal ordering unsupported by synchronized or correlated evidence.

1. The route label alone proves the mechanism
2. The route difference is causally relevant under those tested conditions
3. The route is the sole cause of every similar complaint
4. Every possible application failure is ruled out

Correct answer: B. The route difference is causally relevant under those tested conditions

A controlled reversible comparison strengthens attribution. Keep the scope of workload, path and state conditions explicit.

1. Test a different role from the unaffected network
2. Perform the required action with an approved identity in that role and the affected context
3. Repeat an unauthenticated probe of a public landing page
4. Use an unrestricted admin action as a substitute

Correct answer: B. Perform the required action with an approved identity in that role and the affected context

The probe may exercise a different task or identity. Match the failing action and enforcement context while handling credentials appropriately.

1. Only whether the transport connection opens
2. Successful completion of the intended task alongside delay
3. Only the aggregate response time including errors
4. Only the fastest sample

Correct answer: B. Successful completion of the intended task alongside delay

Speed without correctness can misrepresent recovery. Separate successful task outcomes, errors and timing.

1. Complete recovery because most clients passed
2. Overall improvement from unresolved impact on that specific cohort
3. Random endpoint failure based solely on five exceptions
4. Universal recovery based on the average

Correct answer: B. Overall improvement from unresolved impact on that specific cohort

Group-level failures can be hidden by aggregates. Investigate the shared boundary and avoid declaring complete recovery.

1. Post-reboot readings do not establish the pre-failure thermal state or mechanism
2. The recovery proves the pre-failure temperature was high
3. Any reboot establishes a thermal mechanism
4. A normal later sample rules out all earlier resource problems

Correct answer: A. Post-reboot readings do not establish the pre-failure thermal state or mechanism

The needed evidence concerns the incident condition and causal behavior. Capture appropriately timed telemetry on recurrence or use a controlled supported test.

1. Reproduce the full uncontrolled storm without limits
2. Remove loop protection before planning recovery
3. Use an isolated representative environment or an approved bounded test with explicit stop and rollback conditions
4. Use a nonrepresentative test and claim production equivalence

Correct answer: C. Use an isolated representative environment or an approved bounded test with explicit stop and rollback conditions

A discriminating test should control its impact. Choose a representative scope that produces the necessary evidence without an uncontrolled outage.

1. Saving in the controller proves endpoint receipt
2. An unapplied edit proves the setting cannot matter
3. The treatment was not actually applied at the tested endpoint
4. A no-change outcome proves the original hypothesis false in all contexts

Correct answer: C. The treatment was not actually applied at the tested endpoint

Verify effective intervention state before interpreting results. An unapplied edit is not a valid test of the edited behavior.

1. Assume one incident can have only one fault
2. Test each repair against its relevant prerequisite and then the complete original task
3. Close after the first prerequisite passes
4. Treat resolver repair as proof of backend recovery

Correct answer: B. Test each repair against its relevant prerequisite and then the complete original task

Several independent faults can coexist. Establish each corrected boundary and verify the combined service path.

1. Only the final success screenshot
2. Only the operator's belief that reversal is easy
3. Only the alternate server's name
4. The original mapping, temporary effective mapping, expiry/owner and verified dependencies

Correct answer: D. The original mapping, temporary effective mapping, expiry/owner and verified dependencies

Temporary redirection needs a managed lifecycle and reversibility. Preserve enough state to return safely and remove stale dependencies.

1. The actual address family and path used by the task
2. Only the endpoint's account label
3. Only the nominal application name
4. Only the test's display formatting

Correct answer: A. The actual address family and path used by the task

Protocol family can change routing and enforcement. Verify the application's selected destination and test the relevant path.

1. Similar hostname text proves identical query context
2. Each correct artifact must belong to the same attempt
3. Constructing a fictional single sequence from unrelated evidence
4. The most recent screenshot can replace every older observation

Correct answer: C. Constructing a fictional single sequence from unrelated evidence

Join artifacts using the actual attempt's endpoint, name, type, resolver and time. Correct individual observations do not automatically form one causal chain.

1. Only the intended policy text
2. Only successful admin access
3. Only a timely green link indicator
4. Timed representative task recovery plus explicit guest-to-protected-resource denial tests

Correct answer: D. Timed representative task recovery plus explicit guest-to-protected-resource denial tests

Both availability and boundary requirements need outcomes. A configuration screenshot does not establish either condition by itself.

1. The report must be false because no sample failed
2. The sampling gap cannot affect an outage claim
3. The sampled checks passed; the probe may miss the reported outage
4. Continuous availability is established by every green sample

Correct answer: C. The sampled checks passed; the probe may miss the reported outage

Sampling cadence limits coverage of short events. Use suitable event-triggered or finer observation tied to the task.

1. The record proves prohibited access stayed denied
2. The mechanism and effective intervention cannot be reconstructed
3. The record proves the exact affected rule
4. The record provides sufficient rollback state

Correct answer: B. The mechanism and effective intervention cannot be reconstructed

A useful repair record names the scoped change and outcome. Otherwise later technicians cannot distinguish recurrence from a different policy issue.

1. Nothing, because the feature edit was the intended intervention
2. Feature state and workload changed together
3. Only the test operator's identity
4. Only the final configuration's friendly name

Correct answer: B. Feature state and workload changed together

The result cannot separately attribute recovery to the feature. Match workload or design a comparison that separates the two factors.

1. Every intermediate router must answer that tool
2. The successful application disproves the recorded trace
3. The device must drop all forwarded traffic
4. Traceroute visibility ended there; the successful task contradicts a blanket forwarding-outage claim

Correct answer: D. Traceroute visibility ended there; the successful task contradicts a blanket forwarding-outage claim

Control-message replies can be filtered or limited while forwarding works. Interpret tool-specific visibility within the actual task evidence.

1. Complete recovery because the permitted read action works
2. Proof that every role has correct permissions
3. The repair fails the full acceptance condition despite restoring the read task
4. An acceptable temporary state with no owner or deadline

Correct answer: C. The repair fails the full acceptance condition despite restoring the read task

Required permissions include allowed and denied actions. Correct the scoped authorization and retest both outcomes.

1. The reset proves all packet paths recovered
2. The reset breaks the claimed interval coverage; use valid samples or complementary evidence
3. A zero later counter proves zero drops throughout the outage
4. The counter gap proves the user report false

Correct answer: B. The reset breaks the claimed interval coverage; use valid samples or complementary evidence

Counter continuity and time coverage are prerequisites for the claim. Preserve the gap instead of manufacturing a clean interval.

1. The old configuration is proven correct
2. The reconnection steps are proven irrelevant
3. The old chassis alone is proven defective
4. Service recovered after the combined replacement procedure; failed hardware is not yet isolated

Correct answer: D. Service recovered after the combined replacement procedure; failed hardware is not yet isolated

Several variables changed. Further supported evidence may isolate a component, but the immediate restoration observation is narrower.

1. Only the original failure screenshot
2. Only an assumption that expiration handles every dependency
3. Only a ticket closure label
4. An owner and deadline for permanent correction, exception removal and verification

Correct answer: D. An owner and deadline for permanent correction, exception removal and verification

Temporary access requires explicit follow-up to avoid recurrence or lasting excess permission. Record the current state and next acceptance step.

1. Every untested cohort is assumed to pass
2. The original task passed for the affected cohorts under the tested conditions; the scoped correction and remaining untested cases are recorded
3. Permanent fault-free operation is proven
4. Further observation is unnecessary for any recurrence

Correct answer: B. The original task passed for the affected cohorts under the tested conditions; the scoped correction and remaining untested cases are recorded

A defensible closure names what was verified and preserves its scope. It avoids claims that the evidence cannot establish.