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Question 760
A network ML model correctly classified link congestion before a campus redesign. After a new WAN transport and QoS policy are introduced, false-positive alerts increase sharply. Which maintenance action addresses this change?
- Continue using the original training distribution indefinitely because all models self-correct
- Measure performance on current labeled events and retrain or recalibrate when the observed distribution has shifted
- Replace the observed incident labels with synthetic examples generated by the same model alone
- Disable the syslog collector and treat missing alerts as proof that the model improved
Explanation
Correct Answer
B:Monitoring live accuracy and drift against verified outcomes reveals whether the model needs refreshed labels, thresholds or retraining.
Incorrect Answers
A:Concept drift can alter the relationship between metrics and incidents, so previously acceptable model parameters may become unreliable.
C:Self-generated unverified labels can reinforce existing errors rather than restore alignment with the changed network conditions.
D:Suppressing syslog and telemetry evidence conceals possible failures, leaving no verified labeled outcomes to demonstrate restored model accuracy.
Question 761
A network incident has hundreds of syslog events, and an AI tool should draft a concise written event chronology while operators verify timestamps and technical assertions. Which generative capability is appropriate?
- Use generative AI summarization with factual checks
- Use an anomaly detector alone to produce a polished incident chronology without human evidence checking
- Use a capacity-prediction model to infer incident timestamps from unrelated circuit trends
- Generate the summary from memory without reading the actual logged incident events
Explanation
Correct Answer
A:A language model can summarize supplied records but may omit or invent details.
Incorrect Answers
B:Anomaly scores may highlight events but do not automatically provide a verified textual timeline from logs.
C:Utilization forecasting has a different target from summarizing timestamped syslog records.
D:A trustworthy chronology must use the observed event logs and be fact-checked by operators.
Question 762
A WAN capacity forecast has already been generated from seasonally adjusted traffic history. The predicted peak for a 1-Gb/s link is 920 Mb/s, but the operations team must not purchase capacity based on a single unvalidated point estimate. What should it do with the model output?
- Compare the forecast and its uncertainty with usable link capacity, check recent telemetry, and assess sustained headroom before approving an upgrade
- Approve the upgrade immediately because 920 Mb/s exceeds 90% of a nominal 1 Gb/s
- Ignore the model because a current interface is administratively up
- Buy more bandwidth solely from the model’s prose explanation without reading telemetry
Explanation
Correct Answer
A:Forecasts are estimates, not guarantees. Compare the predicted load, confidence/uncertainty and service headroom with the actual 1-Gb/s usable capacity and corroborate with fresh traffic measurements before committing to an upgrade.
Incorrect Answers
B:A single forecast point above 900 Mb/s is informative, not a guaranteed sustained capacity crisis; uncertainty and usable capacity matter.
C:Link state alone cannot answer future traffic saturation or forecast reliability.
D:Narrative predictions are insufficient without current measurements, forecast uncertainty and business impact evaluation.
Question 763
An ML-based WLAN monitor incorrectly flags every Monday morning occupancy spike as abnormal, although historical Mondays show the same pattern. Which model-design improvement most directly addresses this recurring false-positive pattern?
- Introduce time-of-week contextual features or comparable seasonal baselines before labeling outliers
- Disable the wireless access points during peak occupancy to remove the input events
- Replace measured telemetry with a generated summary that says every day is normal
- Increase router administrative distance so no anomalous clients appear in logs
Explanation
Correct Answer
A:Time-context-aware baselines compare observations with appropriate recurring operating conditions, helping distinguish routine Monday demand from unusual deviations.
Incorrect Answers
B:Disabling real service to suppress alerts alters production behavior rather than improving the detector’s discrimination.
C:A generated claim about normal traffic lacks measurements and cannot replace evidence-based baseline calibration.
D:Administrative distance changes route-source preference, not the temporal reference distribution used by an ML telemetry detector.
Question 764
A support engineer is preparing device configuration and authentication logs for an external AI analysis service. The logs contain SNMPv3 authentication keys and internal host identifiers. What must happen before submission?
- Send the complete raw dump because AI troubleshooting requires live credentials
- Redact secrets and minimize or pseudonymize identifiers before using an approved processing service
- Convert the text to JSON; JSON encoding automatically removes confidential material
- Replace all device timestamps with future times and retain the exposed credential fields
Explanation
Correct Answer
B:Data minimization and secret redaction reduce credential exposure while preserving only the operational signals needed for analysis.
Incorrect Answers
A:Raw cryptographic secrets and sensitive identifiers should not be disclosed to an external model without an explicit legitimate authorization and protection basis.
C:Encoding is a serialization format, not access control or de-identification; confidential values remain visible in the resulting JSON.
D:Changing timestamps damages incident correlation and does not remove the primary security exposure from included secrets.
Question 765
An AI operations engine proposes an ACL modification based on anomaly detection. Which current route/policy validation and approval process should precede a production device change?
- Apply the ACL directly because an anomaly model assigned a high confidence score
- Validate against current routes and a test or approval process
- Replace current ACL evidence with generic past incident summaries
- Turn off production logging and approve the model’s suggestion without a change window
Explanation
Correct Answer
B:AI suggestions need live network evidence and change-control verification.
Incorrect Answers
A:A model score is not tested evidence that the policy change is safe on the current routing topology.
C:Historical narratives may inform diagnosis but cannot validate this specific rule’s current effect and rollback.
D:Hiding telemetry and bypassing a change-control gate increase risk rather than demonstrating policy safety.
Question 766
An incident dataset already contains labeled examples of legitimate and malicious traffic. Which supervised learning approach can classify new observations using those labels?
- Use unsupervised clustering without consulting the existing labels
- Use a supervised classification model
- Use only a generative prose model to make unvalidated labels
- Use a rule that marks all packets malicious regardless of input features
Explanation
Correct Answer
B:Supervised learning can map new inputs to categories learned from labeled examples.
Incorrect Answers
A:Clustering identifies similarity groups but does not directly learn the provided benign/malicious target classes.
C:A text generator is not automatically the supervised labeled-class classification model requested.
D:That ignores the labeled training examples and does not learn distinctions for new observations.
Question 767
The NOC has unlabeled interface telemetry and wants to discover natural groups of similar behavior without supplying predefined class labels. Which unsupervised approach fits?
- Train a supervised classifier that requires labels missing from the source dataset
- Use a time-series forecasting model that predicts only the next utilization value
- Generate free-form text for each measurement without clustering similar observations
- Use unsupervised clustering
Explanation
Correct Answer
D:Unsupervised clustering groups observations without requiring predefined labels.
Incorrect Answers
A:The telemetry is explicitly unlabeled; supervised learning needs defined target class labels.
B:Forecasting a numeric future measurement is not the requested discovery of natural unlabeled behavior groups.
C:Narrative generation does not provide the unsupervised grouping structure requested.
Question 768
A network-language-model tool has written an incident timeline that cites ten syslog events, but one event time and two interface identifiers do not appear in the original logs. Before an operator includes the summary in a change review, what evidence-checking practice is required?
- Cross-check the draft's timestamps, device names and incident claims against the original logs and have a qualified operator correct the report
- Regenerate the text with a higher temperature and assume fluent output is accurate
- Delete the original logs immediately so reviewers judge only the language model's final prose
- Treat the model's asserted confidence score as independent proof that every interface identifier exists
Explanation
Correct Answer
A:Generative tools can draft prose but also invent specifics; source-to-claim verification plus operator review is needed to prevent false incident evidence in the report.
Incorrect Answers
B:Increasing sampling randomness can change wording and invent more unsupported facts; it cannot establish correctness against the actual logs.
C:Removing source evidence prevents validation of chronology and device identifiers and is contrary to the requirement for a defensible change review.
D:A confidence-like self-report from the same model is not a verified network record and does not replace checking each cited event against its raw source.
Question 769
An AI advisor recommends changing OSPF cost for a critical WAN edge. Which preproduction validation and change-control gate should determine whether that suggestion may be deployed?
- Deploy the OSPF cost change immediately if the AI output is grammatically coherent
- Use only the model’s confidence score as a substitute for current OSPF topology
- Apply the change silently to every WAN router to avoid delays
- Use policy validation and a preproduction test
Explanation
Correct Answer
D:Operational checks and approval control high-risk command deployment.
Incorrect Answers
A:Fluency does not establish correctness; path impact must be tested under change control.
B:Model scores cannot validate the live route state, potential failovers or rollback safety.
C:Unscoped production changes increase outage risk and violate controlled test and approval requirements.
Question 770
A service desk wants to analyze telemetry through an AI tool, but raw input includes tokens and user-identifying logs. Which data-minimization and redaction process should apply before sharing the inputs?
- Send raw access tokens to the AI tool so it can reason about every device credential
- Replace usernames in the presentation but leave them in the raw source file sent to the service
- Use approved data handling and redaction controls
- Retain all packet payloads, personal identifiers and credentials without retention limits
Explanation
Correct Answer
C:Privacy controls restrict what sensitive operational data is supplied to models.
Incorrect Answers
A:Reusable secrets should not be transmitted where they are unnecessary for telemetry analysis.
B:Presentation masking does not remove identifying data from the transmitted input.
D:Unnecessary sensitive collection violates data minimization and approved handling controls.
Cisco Certified Network Associate (CCNA) (200-301) Practice Tests