Question 640 A server distributes correct IPv4 leases but a client repeatedly declines them after detecting another host already using the offered address. Which lasting design or operational safeguard best prevents this particular issue from recurring? Pair DHCP relay configuration with firewall-path validation in remote-site templates. Test RA flags and DHCPv6 relay together when deploying stateful IPv6 addressing. Include relay address and interface inventory in VLAN turn-up checklists. Monitor DHCP conflicts and enforce centralized IP address ownership. ExplanationCorrect Answer D:Monitor DHCP conflicts and enforce centralized IP address ownership. This addresses the recurring cause: DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. A targeted acceptance check is: Resolve duplicate use and confirm clean offers, ACKs and absence of further conflict events. Other Answers A:Pair DHCP relay configuration with firewall-path validation in remote-site templates. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. B:Test RA flags and DHCPv6 relay together when deploying stateful IPv6 addressing. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size. C:Include relay address and interface inventory in VLAN turn-up checklists. DHCP decline or conflict handling indicates offered addresses may already be in use, not simply insufficient pool size.
Question 641 A floating static route remains active after a remote ISP path fails beyond the local interface because only the physical link is checked. Which corrective action most directly resolves the documented failure without suppressing unrelated safeguards? Associate a meaningful IP SLA reachability operation with a track object used by route selection. Use an appropriate IP SLA UDP jitter test with relevant endpoint support and network settings. Tune approved track down/up delays or probe thresholds based on measured failure duration. Update the IP SLA application probe target and success criterion to match the service health definition. ExplanationCorrect Answer A:Associate a meaningful IP SLA reachability operation with a track object used by route selection. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. Fail the remote target and observe track Down, primary withdrawal and backup route installation. Other Answers B:Use an appropriate IP SLA UDP jitter test with relevant endpoint support and network settings. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. C:Tune approved track down/up delays or probe thresholds based on measured failure duration. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. D:Update the IP SLA application probe target and success criterion to match the service health definition. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface.
Question 642 A floating static route remains active after a remote ISP path fails beyond the local interface because only the physical link is checked. Which technical mechanism best explains the behavior observed in this scenario? ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. Application-layer SLA success depends on configured request and response expectations, not just network socket reachability. ExplanationCorrect Answer B:IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. This explains why the initial condition produces the observed failure. The direct repair is: Associate a meaningful IP SLA reachability operation with a track object used by route selection. Validate through: Fail the remote target and observe track Down, primary withdrawal and backup route installation. Other Answers A:ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. C:SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. D:Application-layer SLA success depends on configured request and response expectations, not just network socket reachability. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface.
Question 643 A floating static route remains active after a remote ISP path fails beyond the local interface because only the physical link is checked. After applying the correction, which verification evidence most directly demonstrates that this issue is resolved? Capture the requested URL or response and verify the corrected SLA result matches the application's intended behavior. Inspect probe source and VRF and verify success over the tenant forwarding context. Fail the remote target and observe track Down, primary withdrawal and backup route installation. Compare jitter, latency and loss readings with the observed real-time media impairment. ExplanationCorrect Answer C:Fail the remote target and observe track Down, primary withdrawal and backup route installation. This checks the affected traffic or control-plane behavior, not merely a generic up/down indicator. The underlying mechanism is: IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. Other Answers A:Capture the requested URL or response and verify the corrected SLA result matches the application's intended behavior. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. B:Inspect probe source and VRF and verify success over the tenant forwarding context. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. D:Compare jitter, latency and loss readings with the observed real-time media impairment. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface.
Question 644 A floating static route remains active after a remote ISP path fails beyond the local interface because only the physical link is checked. Which lasting design or operational safeguard best prevents this particular issue from recurring? Document per-VRF probe identities for monitored overlays and customer routing. Monitor media-sensitive paths with performance probes rather than binary reachability alone. Review probe endpoint and success logic when applications change. Use representative remote targets and test failover beyond the first-hop interface. ExplanationCorrect Answer D:Use representative remote targets and test failover beyond the first-hop interface. This addresses the recurring cause: IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. A targeted acceptance check is: Fail the remote target and observe track Down, primary withdrawal and backup route installation. Other Answers A:Document per-VRF probe identities for monitored overlays and customer routing. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. B:Monitor media-sensitive paths with performance probes rather than binary reachability alone. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. C:Review probe endpoint and success logic when applications change. IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface.
Question 645 An IP SLA ICMP test reports failure only from one VRF although the destination is reachable through another tenant VRF. Which corrective action most directly resolves the documented failure without suppressing unrelated safeguards? Run the SLA operation in the intended VRF with a source and route context that can reach the target. Use an appropriate IP SLA UDP jitter test with relevant endpoint support and network settings. Associate a meaningful IP SLA reachability operation with a track object used by route selection. Tune approved track down/up delays or probe thresholds based on measured failure duration. ExplanationCorrect Answer A:Run the SLA operation in the intended VRF with a source and route context that can reach the target. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. Inspect probe source and VRF and verify success over the tenant forwarding context. Other Answers B:Use an appropriate IP SLA UDP jitter test with relevant endpoint support and network settings. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. C:Associate a meaningful IP SLA reachability operation with a track object used by route selection. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. D:Tune approved track down/up delays or probe thresholds based on measured failure duration. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability.
Question 646 An IP SLA ICMP test reports failure only from one VRF although the destination is reachable through another tenant VRF. Which technical mechanism best explains the behavior observed in this scenario? Application-layer SLA success depends on configured request and response expectations, not just network socket reachability. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. An IP SLA definition without active scheduling produces no continuous probe results for dependent tracking. ExplanationCorrect Answer B:SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. This explains why the initial condition produces the observed failure. The direct repair is: Run the SLA operation in the intended VRF with a source and route context that can reach the target. Validate through: Inspect probe source and VRF and verify success over the tenant forwarding context. Other Answers A:Application-layer SLA success depends on configured request and response expectations, not just network socket reachability. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. C:ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. D:An IP SLA definition without active scheduling produces no continuous probe results for dependent tracking. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability.
Question 647 An IP SLA ICMP test reports failure only from one VRF although the destination is reachable through another tenant VRF. After applying the correction, which verification evidence most directly demonstrates that this issue is resolved? Capture the requested URL or response and verify the corrected SLA result matches the application's intended behavior. Observe operation runtime state, fresh response history and track transitions under a test outage. Inspect probe source and VRF and verify success over the tenant forwarding context. Fail the remote target and observe track Down, primary withdrawal and backup route installation. ExplanationCorrect Answer C:Inspect probe source and VRF and verify success over the tenant forwarding context. This checks the affected traffic or control-plane behavior, not merely a generic up/down indicator. The underlying mechanism is: SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. Other Answers A:Capture the requested URL or response and verify the corrected SLA result matches the application's intended behavior. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. B:Observe operation runtime state, fresh response history and track transitions under a test outage. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. D:Fail the remote target and observe track Down, primary withdrawal and backup route installation. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability.
Question 648 An IP SLA ICMP test reports failure only from one VRF although the destination is reachable through another tenant VRF. Which lasting design or operational safeguard best prevents this particular issue from recurring? Audit both SLA definitions and schedules before activating tracked routing. Review probe endpoint and success logic when applications change. Use representative remote targets and test failover beyond the first-hop interface. Document per-VRF probe identities for monitored overlays and customer routing. ExplanationCorrect Answer D:Document per-VRF probe identities for monitored overlays and customer routing. This addresses the recurring cause: SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. A targeted acceptance check is: Inspect probe source and VRF and verify success over the tenant forwarding context. Other Answers A:Audit both SLA definitions and schedules before activating tracked routing. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. B:Review probe endpoint and success logic when applications change. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. C:Use representative remote targets and test failover beyond the first-hop interface. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability.
Question 649 A VOIP team uses only IP SLA ICMP reachability and misses bursty delay variation that users experience as choppy audio. Which corrective action most directly resolves the documented failure without suppressing unrelated safeguards? Use an appropriate IP SLA UDP jitter test with relevant endpoint support and network settings. Associate a meaningful IP SLA reachability operation with a track object used by route selection. Run the SLA operation in the intended VRF with a source and route context that can reach the target. Update the IP SLA application probe target and success criterion to match the service health definition. ExplanationCorrect Answer A:Use an appropriate IP SLA UDP jitter test with relevant endpoint support and network settings. ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. Compare jitter, latency and loss readings with the observed real-time media impairment. Other Answers B:Associate a meaningful IP SLA reachability operation with a track object used by route selection. ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. C:Run the SLA operation in the intended VRF with a source and route context that can reach the target. ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. D:Update the IP SLA application probe target and success criterion to match the service health definition. ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss.
Question 650 A VOIP team uses only IP SLA ICMP reachability and misses bursty delay variation that users experience as choppy audio. Which technical mechanism best explains the behavior observed in this scenario? IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. Tracking with immediate state transitions can magnify short probe anomalies into disruptive route oscillations. ExplanationCorrect Answer B:ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. This explains why the initial condition produces the observed failure. The direct repair is: Use an appropriate IP SLA UDP jitter test with relevant endpoint support and network settings. Validate through: Compare jitter, latency and loss readings with the observed real-time media impairment. Other Answers A:IP SLA measures configured end-to-end reachability and tracking can withdraw a route despite a locally up interface. ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. C:SLA probes use their configured source/VRF reachability context; success in the global table does not prove VRF reachability. ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss. D:Tracking with immediate state transitions can magnify short probe anomalies into disruptive route oscillations. ICMP reachability tests connectivity, while UDP jitter operations can measure variation in packet delay and loss.
