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Cisco 350-501 Practice Test 69

Question 680

For an original SPCOR service-provider engineering scenario, consider: A carrier observes unexplained flow gaps because the collector receives data records but never processes the IPFIX template defining their fields. Select TWO complementary steps: the targeted correction and its strongest prechange validation.

  1. Assume a sampled flow report includes every packet payload and needs no template decoding to interpret counters.
  2. Check: Trace one known link flap across device clock, gNMI update, IPFIX flow record and monitoring event with ingestion-lag checks.
  3. Change: Use a verified inventory and idempotent supported network modules with meaningful prechecks, task results and stable desired-state templates.
  4. Change: Align exporter and collector template handling, source interface, sampling and timeout settings, then validate interpreted flow fields.
  5. Check: Compare exported templates, sequence counters, sampling rate, collector parsing and independently measured test-flow traffic.

Explanation

Correct Answer

D:

NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct. Acceptance: The collector identifies correct source and destination flows with explicit sampling limits and detects exporter or template loss.

E:

NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct. Required intervention: Align exporter and collector template handling, source interface, sampling and timeout settings, then validate interpreted flow fields.

Incorrect Answers

A:

For this select two assessment, the shortcut changes or bypasses the necessary routing, service or operational boundary rather than correcting it. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

B:

Check: Trace one known link flap across device clock, gNMI update, IPFIX flow record and monitoring event with ingestion-lag checks. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

C:

Change: Use a verified inventory and idempotent supported network modules with meaningful prechecks, task results and stable desired-state templates. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

Question 681

A service provider network engineer is reviewing this backbone or customer-service scenario: A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context. A proposed shortcut is: Assume a sampled flow report includes every packet payload and needs no template decoding to interpret counters. What should the service provider engineer recommend as the narrowly scoped correction? Select ONE best answer.

  1. Assume a sampled flow report includes every packet payload and needs no template decoding to interpret counters.
  2. Execute NETCONF operations against the intended supported datastore and verify RPC outcomes, commit state and operational configuration.
  3. Use a verified inventory and idempotent supported network modules with meaningful prechecks, task results and stable desired-state templates.
  4. Align exporter and collector template handling, source interface, sampling and timeout settings, then validate interpreted flow fields.

Explanation

Correct Answer

D:

This targeted action addresses the observed service-provider control or forwarding gap without discarding necessary controls. Applied case: A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context.

Incorrect Answers

A:

NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct. Applied case: A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context.

B:

Execute NETCONF operations against the intended supported datastore and verify RPC outcomes, commit state and operational configuration. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

C:

Use a verified inventory and idempotent supported network modules with meaningful prechecks, task results and stable desired-state templates. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

Question 682

A Cisco service provider design review finds: A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context. The team proposes: Align exporter and collector template handling, source interface, sampling and timeout settings, then validate interpreted flow fields. Which engineering principle most strongly supports the recommended response? Select ONE best answer.

  1. Automation assurance depends on current trusted data sources and consistent time or interface identities; a collected metric without context can produce a misleading incident.
  2. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.
  3. Secure ZTP reduces manual first-boot work while requiring device identity, image integrity and confidentiality for configuration and enrollment secrets.
  4. NETCONF uses modeled XML RPC messages and datastore operations; an active SSH transport or accepted candidate does not necessarily mean a committed change.

Explanation

Correct Answer

B:

Demonstrable success requires: The collector identifies correct source and destination flows with explicit sampling limits and detects exporter or template loss. Applied case: A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context.

Incorrect Answers

A:

Automation assurance depends on current trusted data sources and consistent time or interface identities; a collected metric without context can produce a misleading incident. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

C:

Secure ZTP reduces manual first-boot work while requiring device identity, image integrity and confidentiality for configuration and enrollment secrets. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

D:

NETCONF uses modeled XML RPC messages and datastore operations; an active SSH transport or accepted candidate does not necessarily mean a committed change. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

Question 683

The service provider operations team has not yet approved a change. Current evidence indicates: A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context. Which evidence best tests the technical diagnosis before approving a disruptive change? Select ONE best answer.

  1. Inspect modeled service inputs, dry-run target diffs, device transaction outcomes and an injected failure during a lab provision.
  2. Check bootstrap trust, certificate or signed-image verification, credential issuance, endpoint authorization and failure handling in a spare router lab.
  3. Inspect security level, user and engine parameters, permitted managers, packet captures and a representative interface counter query and notification.
  4. Compare exported templates, sequence counters, sampling rate, collector parsing and independently measured test-flow traffic.

Explanation

Correct Answer

D:

NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct. Confirm afterward that: The collector identifies correct source and destination flows with explicit sampling limits and detects exporter or template loss.

Incorrect Answers

A:

Inspect modeled service inputs, dry-run target diffs, device transaction outcomes and an injected failure during a lab provision. A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context.

B:

Check bootstrap trust, certificate or signed-image verification, credential issuance, endpoint authorization and failure handling in a spare router lab. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

C:

Inspect security level, user and engine parameters, permitted managers, packet captures and a representative interface counter query and notification. A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context.

Question 684

A candidate correction has been tested and the platform team requires a post-change acceptance check. Original problem: A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context. The carrier operations owner needs positive and negative tests showing existing customer services remain available. Which acceptance result demonstrates correct service provider forwarding and control behavior without disrupting authorized workflows? Select ONE best answer.

  1. Only authenticated collectors and devices exchange model-consistent telemetry, and certificate rotation can be validated without blind trust bypass.
  2. The collector identifies correct source and destination flows with explicit sampling limits and detects exporter or template loss.
  3. Approved collectors can query counters securely and unauthorized requests fail while essential traps remain observable.
  4. The service converges consistently or exposes a recoverable failure without silent partial configuration across customers.

Explanation

Correct Answer

B:

NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct. The approved implementation step was: Align exporter and collector template handling, source interface, sampling and timeout settings, then validate interpreted flow fields.

Incorrect Answers

A:

Only authenticated collectors and devices exchange model-consistent telemetry, and certificate rotation can be validated without blind trust bypass. A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context.

C:

Approved collectors can query counters securely and unauthorized requests fail while essential traps remain observable. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

D:

The service converges consistently or exposes a recoverable failure without silent partial configuration across customers. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

Question 685

An implementation sign-off request identifies the following problem: A core router exports sampled flows and the operations dashboard reports sample counts as exact packet totals without applying the configured sampling context. Which paired technical change and validation should close the implementation review? Select ONE best answer.

  1. Change: Normalize model identifiers, timestamps and collector health across gNMI, flow and management telemetry before declaring a backbone service incident. Verify: Trace one known link flap across device clock, gNMI update, IPFIX flow record and monitoring event with ingestion-lag checks.
  2. Change: Align exporter and collector template handling, source interface, sampling and timeout settings, then validate interpreted flow fields. Verify: Compare exported templates, sequence counters, sampling rate, collector parsing and independently measured test-flow traffic.
  3. Change: Execute NETCONF operations against the intended supported datastore and verify RPC outcomes, commit state and operational configuration. Verify: Compare NETCONF hello capabilities, target datastore, rpc-reply ok or rpc-error and device running configuration after a staged edit.
  4. Change: Use documented SNMP access restrictions and authenticated encrypted SNMPv3 where supported and verify polling and notifications separately. Verify: Inspect security level, user and engine parameters, permitted managers, packet captures and a representative interface counter query and notification.

Explanation

Correct Answer

B:

NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct. The change is successful only when: The collector identifies correct source and destination flows with explicit sampling limits and detects exporter or template loss.

Incorrect Answers

A:

Change: Normalize model identifiers, timestamps and collector health across gNMI, flow and management telemetry before declaring a backbone service incident. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

C:

Change: Execute NETCONF operations against the intended supported datastore and verify RPC outcomes, commit state and operational configuration. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

D:

Change: Use documented SNMP access restrictions and authenticated encrypted SNMPv3 where supported and verify polling and notifications separately. NetFlow and IPFIX export summarized flow records whose field templates and sampling rules determine what collectors can reconstruct.

Question 686

A service provider network engineer is reviewing this backbone or customer-service scenario: A customer-facing router still allows SNMPv2c read access with a shared public community from arbitrary source addresses after a monitoring migration. A proposed shortcut is: Enable SNMPv2c public write access everywhere and assume the community string encrypts every management frame. What should the service provider engineer recommend as the narrowly scoped correction? Select ONE best answer.

  1. Use a verified inventory and idempotent supported network modules with meaningful prechecks, task results and stable desired-state templates.
  2. Use documented SNMP access restrictions and authenticated encrypted SNMPv3 where supported and verify polling and notifications separately.
  3. Enable SNMPv2c public write access everywhere and assume the community string encrypts every management frame.
  4. Represent service intent using supported Cisco NSO models and dry-run transactional changes and validate device diffs and recovery behavior.

Explanation

Correct Answer

B:

This targeted action addresses the observed service-provider control or forwarding gap without discarding necessary controls. Applied case: A customer-facing router still allows SNMPv2c read access with a shared public community from arbitrary source addresses after a monitoring migration.

Incorrect Answers

A:

Use a verified inventory and idempotent supported network modules with meaningful prechecks, task results and stable desired-state templates. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

C:

SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages. For this best change assessment, the shortcut changes or bypasses the necessary routing, service or operational boundary rather than correcting it.

D:

Represent service intent using supported Cisco NSO models and dry-run transactional changes and validate device diffs and recovery behavior. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

Question 687

A Cisco service provider design review finds: A customer-facing router still allows SNMPv2c read access with a shared public community from arbitrary source addresses after a monitoring migration. The team proposes: Use documented SNMP access restrictions and authenticated encrypted SNMPv3 where supported and verify polling and notifications separately. Which engineering principle most strongly supports the recommended response? Select ONE best answer.

  1. Automation assurance depends on current trusted data sources and consistent time or interface identities; a collected metric without context can produce a misleading incident.
  2. Terraform tracks managed resource identities in state and computes provider-specific actions; reliable remote state and locking prevent accidental concurrent corruption.
  3. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.
  4. Ansible hosts and groups determine the execution scope while modules and conditions can converge device configuration without uncontrolled repeated changes.

Explanation

Correct Answer

C:

Demonstrable success requires: Approved collectors can query counters securely and unauthorized requests fail while essential traps remain observable. This principle explains the proposed technical approach, which is: Use documented SNMP access restrictions and authenticated encrypted SNMPv3 where supported and verify polling and notifications separately.

Incorrect Answers

A:

Automation assurance depends on current trusted data sources and consistent time or interface identities; a collected metric without context can produce a misleading incident. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

B:

Terraform tracks managed resource identities in state and computes provider-specific actions; reliable remote state and locking prevent accidental concurrent corruption. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

D:

Ansible hosts and groups determine the execution scope while modules and conditions can converge device configuration without uncontrolled repeated changes. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

Question 688

The service provider operations team has not yet approved a change. Current evidence indicates: A customer-facing router still allows SNMPv2c read access with a shared public community from arbitrary source addresses after a monitoring migration. Which evidence best tests the technical diagnosis before approving a disruptive change? Select ONE best answer.

  1. Run check mode or an isolated deployment twice, comparing targeted hosts, command diff, failed hosts and change counts.
  2. Compare NETCONF hello capabilities, target datastore, rpc-reply ok or rpc-error and device running configuration after a staged edit.
  3. Trace one known link flap across device clock, gNMI update, IPFIX flow record and monitoring event with ingestion-lag checks.
  4. Inspect security level, user and engine parameters, permitted managers, packet captures and a representative interface counter query and notification.

Explanation

Correct Answer

D:

SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages. Applied case: A customer-facing router still allows SNMPv2c read access with a shared public community from arbitrary source addresses after a monitoring migration.

Incorrect Answers

A:

Run check mode or an isolated deployment twice, comparing targeted hosts, command diff, failed hosts and change counts. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

B:

Compare NETCONF hello capabilities, target datastore, rpc-reply ok or rpc-error and device running configuration after a staged edit. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

C:

Trace one known link flap across device clock, gNMI update, IPFIX flow record and monitoring event with ingestion-lag checks. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

Question 689

A candidate correction has been tested and the platform team requires a post-change acceptance check. Original problem: A customer-facing router still allows SNMPv2c read access with a shared public community from arbitrary source addresses after a monitoring migration. The carrier operations owner needs positive and negative tests showing existing customer services remain available. Which acceptance result demonstrates correct service provider forwarding and control behavior without disrupting authorized workflows? Select ONE best answer.

  1. Reviewed plans converge expected resources without conflicting state writes or unapproved destructive network actions.
  2. The collector identifies correct source and destination flows with explicit sampling limits and detects exporter or template loss.
  3. Only valid transactions enter the intended configuration datastore and any commit failure is clearly reported and rolled back where supported.
  4. Approved collectors can query counters securely and unauthorized requests fail while essential traps remain observable.

Explanation

Correct Answer

D:

SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages. The approved implementation step was: Use documented SNMP access restrictions and authenticated encrypted SNMPv3 where supported and verify polling and notifications separately.

Incorrect Answers

A:

Reviewed plans converge expected resources without conflicting state writes or unapproved destructive network actions. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

B:

This option addresses a different service provider engineering topic (NetFlow IPFIX exporter templates and sampling) rather than the documented SNMPv3 authentication privacy and trap health decision.

C:

Only valid transactions enter the intended configuration datastore and any commit failure is clearly reported and rolled back where supported. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

Question 690

For an original SPCOR service-provider engineering scenario, consider: A customer-facing router still allows SNMPv2c read access with a shared public community from arbitrary source addresses after a monitoring migration. Select TWO complementary steps: the targeted correction and its strongest prechange validation.

  1. Check: Inspect security level, user and engine parameters, permitted managers, packet captures and a representative interface counter query and notification.
  2. Change: Use the platform's published YANG module and typed hierarchical schema to construct data operations with validated paths and leaf types.
  3. Change: Use documented SNMP access restrictions and authenticated encrypted SNMPv3 where supported and verify polling and notifications separately.
  4. Check: Check state addresses, lock contention, plan create-update-destroy actions and expected controller changes in a sandbox.
  5. Enable SNMPv2c public write access everywhere and assume the community string encrypts every management frame.

Explanation

Correct Answer

A:

SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages. Required intervention: Use documented SNMP access restrictions and authenticated encrypted SNMPv3 where supported and verify polling and notifications separately.

C:

SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages. Acceptance: Approved collectors can query counters securely and unauthorized requests fail while essential traps remain observable.

Incorrect Answers

B:

This option addresses a different service provider engineering topic (YANG typed schemas and provider automation models) rather than the documented SNMPv3 authentication privacy and trap health decision.

D:

Check: Check state addresses, lock contention, plan create-update-destroy actions and expected controller changes in a sandbox. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

E:

For this select two assessment, the shortcut changes or bypasses the necessary routing, service or operational boundary rather than correcting it. SNMPv3 security models can provide authenticated and private management traffic; v2c communities do not themselves encrypt or strongly authenticate messages.

Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) (350-501) Practice Tests