CompTIA SK0-005 Practice Test 75
Question 740
A change board is planning a verified response to this server event: A web node has stale negative DNS cache after an application record is created, while peer nodes resolve successfully. For the DNS client-specific failure issue, which response elements belong in the approved plan? Select TWO answers.
- Change the application's database schema to compensate for an unresolved hostname.
- Compare dig/nslookup answers per resolver, cache state, DNS suffix, zone authority and TTLs.
- Only intended VLANs traverse the trunk and test VMs reach their approved peers.
- Test client resolvers and cached records, correct zone or resolver settings and honor TTL behavior.
- Identify whether blocks, inodes, quotas or reserved space is exhausted; reclaim or expand only the constrained resource.
Explanation
Correct Answer
B:Use findings to decide whether to: Test client resolvers and cached records, correct zone or resolver settings and honor TTL behavior. These observations investigate the exact DNS client-specific failure failure rather than unrelated components.
D:Name resolution failures should be isolated from transport connectivity by comparing direct IP and DNS queries. This is the appropriate targeted correction for DNS client-specific failure.
Incorrect Answers
A:Name resolution failures should be isolated from transport connectivity by comparing direct IP and DNS queries.
C:For this incident, the relevant principle is: Name resolution failures should be isolated from transport connectivity by comparing direct IP and DNS queries. This statement concerns Incorrect switch VLAN trunk allowance, a different Server+ technical control.
E:For this incident, the relevant principle is: Name resolution failures should be isolated from transport connectivity by comparing direct IP and DNS queries. This statement concerns Filesystem full, inode exhaustion and quotas, a different Server+ technical control.
Question 741
A server administrator is investigating a server issue involving dhcp and ip address conflict isolation: Two hosts periodically lose connectivity because an old static IP overlaps with a live DHCP pool. The change must address the documented fault without creating unrelated risk. Which corrective action is most appropriate? Select ONE best answer.
- Test client resolvers and cached records, correct zone or resolver settings and honor TTL behavior.
- Hardcode the same address on every affected server to prevent lease-renewal events.
- Inspect forward/return routing, gateway selection and stateful firewall rules; correct the narrow route or policy.
- Trace conflicting ARP/DHCP responses, eliminate overlapping assignments or rogue offers and correct lease options.
Explanation
Correct Answer
D:Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
Incorrect Answers
A:This statement concerns DNS client-specific failure, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
B:This is the unsafe shortcut in the DHCP and IP address conflict isolation scenario, not a justified remediation or diagnostic. Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
C:That option would inspect forward/return routing, gateway selection and stateful firewall rules; correct the narrow route or policy, but it addresses a different concern. Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
Question 742
While reviewing the CompTIA Server+ administration incident, a technician learns: Two hosts periodically lose connectivity because an old static IP overlaps with a live DHCP pool. Which principle most directly explains how to address the described issue safely? Select ONE best answer.
- Power redundancy requires end-to-end capacity and isolation, not merely green status indicators on redundant modules.
- Correctable memory errors are early-warning evidence; a rising count can precede uncorrectable failures.
- Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
- Tagged VLAN traffic must be permitted end-to-end; routing changes do not repair a missing layer-two VLAN path.
Explanation
Correct Answer
C:The acceptance test is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
Incorrect Answers
A:This statement concerns PSU and power event isolation, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
B:This statement concerns Correctable ECC error escalation, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
D:This statement concerns Incorrect switch VLAN trunk allowance, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
Question 743
Before a server change is approved, the on-call engineer receives this incident report: Two hosts periodically lose connectivity because an old static IP overlaps with a live DHCP pool. Which evidence would most directly establish the stated root-cause hypothesis? Select ONE best answer.
- Hardcode the same address on every affected server to prevent lease-renewal events.
- Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options.
- Trace route tables, firewall session logs, interface captures and asymmetric path metrics.
- Inspect switchport mode, native VLAN, allowed VLAN set, MAC learning and packet tags on the affected uplink.
Explanation
Correct Answer
B:These observations investigate the exact DHCP and IP address conflict isolation failure rather than unrelated components. Incident: Two hosts periodically lose connectivity because an old static IP overlaps with a live DHCP pool.
Incorrect Answers
A:This is the unsafe shortcut in the DHCP and IP address conflict isolation scenario, not a justified remediation or diagnostic. Incident: Two hosts periodically lose connectivity because an old static IP overlaps with a live DHCP pool.
C:For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options.
D:For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
Question 744
After the team implements a targeted remediation for DHCP and IP address conflict isolation, the original incident was: Two hosts periodically lose connectivity because an old static IP overlaps with a live DHCP pool. Which acceptance criterion would best demonstrate a durable and safe resolution? Select ONE best answer.
- Affected clients resolve the correct application endpoint and connect consistently.
- Malicious login attempts are contained without losing authorized administrative access.
- Hardware reports no recurring ECC faults and memory validation passes under representative load.
- Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
Explanation
Correct Answer
D:Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
Incorrect Answers
A:This statement concerns DNS client-specific failure, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair.
B:This statement concerns Brute-force authentication and account lockout, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
C:This statement concerns Correctable ECC error escalation, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair.
Question 745
A change board is planning a verified response to this server event: Two hosts periodically lose connectivity because an old static IP overlaps with a live DHCP pool. For the DHCP and IP address conflict isolation issue, which response elements belong in the approved plan? Select ONE best answer.
- Trace conflicting ARP/DHCP responses, eliminate overlapping assignments or rogue offers and correct lease options. Then validate the change by confirming: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
- Correct access/trunk VLAN membership and allowed VLAN lists while preserving intended segmentation.
- Hardcode the same address on every affected server to prevent lease-renewal events.
- Examine controller cache mode, BBU/flash status, workload write latency and vendor alerts.
Explanation
Correct Answer
A:Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. The proposed change and outcome assessment work together for DHCP and IP address conflict isolation.
Incorrect Answers
B:This statement concerns Incorrect switch VLAN trunk allowance, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair.
C:This is the unsafe shortcut in the DHCP and IP address conflict isolation scenario, not a justified remediation or diagnostic. Discriminate using: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options.
D:This statement concerns Write cache battery and storage performance, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
Question 746
A server administrator is investigating a server issue involving dhcp and ip address conflict isolation: A network segment receives a wrong gateway from an unauthorized DHCP server, redirecting traffic after lease renewal. The change must address the documented fault without creating unrelated risk. Which corrective action is most appropriate? Select ONE best answer.
- Restore the supported boot entry or known-good kernel and rebuild boot images as needed using tested recovery media.
- Hardcode the same address on every affected server to prevent lease-renewal events.
- Trace and test PSU, cables, PDU, UPS and breaker paths under a safely controlled maintenance procedure.
- Trace conflicting ARP/DHCP responses, eliminate overlapping assignments or rogue offers and correct lease options.
Explanation
Correct Answer
D:Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A successful outcome is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
Incorrect Answers
A:This statement concerns Boot loader and failed update recovery, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
B:This is the unsafe shortcut in the DHCP and IP address conflict isolation scenario, not a justified remediation or diagnostic. Incident: A network segment receives a wrong gateway from an unauthorized DHCP server, redirecting traffic after lease renewal.
C:That option would trace and test PSU, cables, PDU, UPS and breaker paths under a safely controlled maintenance procedure, but it addresses a different concern. Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
Question 747
While reviewing the CompTIA Server+ administration incident, a technician learns: A network segment receives a wrong gateway from an unauthorized DHCP server, redirecting traffic after lease renewal. Which principle most directly explains how to address the described issue safely? Select ONE best answer.
- Guest CPU and memory counters alone can mask hypervisor scheduling delay and host swapping.
- Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
- Boot failures may arise before services start; distinguish firmware/bootloader problems from application outages.
- Power redundancy requires end-to-end capacity and isolation, not merely green status indicators on redundant modules.
Explanation
Correct Answer
B:The acceptance test is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings. This is the controlling principle for the reported DHCP and IP address conflict isolation incident.
Incorrect Answers
A:This statement concerns Hypervisor contention causing guest latency, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
C:This statement concerns Boot loader and failed update recovery, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair.
D:This statement concerns PSU and power event isolation, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
Question 748
Before a server change is approved, the on-call engineer receives this incident report: A network segment receives a wrong gateway from an unauthorized DHCP server, redirecting traffic after lease renewal. Which evidence would most directly establish the stated root-cause hypothesis? Select ONE best answer.
- Compare CPU ready, host memory reclaim, NUMA locality, datastore latency and workload peaks.
- Compare dig/nslookup answers per resolver, cache state, DNS suffix, zone authority and TTLs.
- Hardcode the same address on every affected server to prevent lease-renewal events.
- Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options.
Explanation
Correct Answer
D:These observations investigate the exact DHCP and IP address conflict isolation failure rather than unrelated components. The expected technical relationship is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
Incorrect Answers
A:For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. This statement concerns Hypervisor contention causing guest latency, a different Server+ technical control.
B:For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. This statement concerns DNS client-specific failure, a different Server+ technical control.
C:Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
Question 749
After the team implements a targeted remediation for DHCP and IP address conflict isolation, the original incident was: A network segment receives a wrong gateway from an unauthorized DHCP server, redirecting traffic after lease renewal. Which acceptance criterion would best demonstrate a durable and safe resolution? Select ONE best answer.
- Malicious login attempts are contained without losing authorized administrative access.
- The host boots the approved OS reliably through several cold boots with disk access intact.
- Only intended VLANs traverse the trunk and test VMs reach their approved peers.
- Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
Explanation
Correct Answer
D:Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
Incorrect Answers
A:This statement concerns Brute-force authentication and account lockout, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
B:This statement concerns Boot loader and failed update recovery, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
C:This statement concerns Incorrect switch VLAN trunk allowance, a different Server+ technical control. It does not directly address the reported DHCP and IP address conflict isolation fault or prove its repair. For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. A targeted investigation checks: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
Question 750
A change board is planning a verified response to this server event: A network segment receives a wrong gateway from an unauthorized DHCP server, redirecting traffic after lease renewal. For the DHCP and IP address conflict isolation issue, which response elements belong in the approved plan? Select TWO answers.
- Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options.
- Trace conflicting ARP/DHCP responses, eliminate overlapping assignments or rogue offers and correct lease options.
- Hardcode the same address on every affected server to prevent lease-renewal events.
- Only intended VLANs traverse the trunk and test VMs reach their approved peers.
- Use host and guest metrics to identify hypervisor resource contention, then right-size or rebalance allocations.
Explanation
Correct Answer
A:These observations investigate the exact DHCP and IP address conflict isolation failure rather than unrelated components. Confirm remediation through: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.
B:Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy.
Incorrect Answers
C:Discriminate using: Capture DHCP offers and ARP announcements, inspect scope exclusions, MAC addresses and gateway options.
D:For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. This statement concerns Incorrect switch VLAN trunk allowance, a different Server+ technical control.
E:For this incident, the relevant principle is: Intermittent IP conflicts and unauthorized DHCP options can appear as random server outages while switch ports remain healthy. The desired recovery condition is: Clients obtain unique approved addresses and correct gateways without duplicate-IP warnings.