Question 120
A network team addresses this situation: An analytics cluster generates heavy server-to-server traffic, and a three-tier hierarchy creates uneven paths. After the corrective action, which test or result BEST verifies that the problem is resolved?
- Fail one aggregation switch and verify access uplinks converge.
- Model circuit count and verify branches communicate through approved hubs.
- Simulate loss of a central uplink and verify continuity via the alternate.
- Measure leaf-to-leaf throughput and failover across spines.
Explanation
Correct Answer
D:Balanced paths validate the fabric layout. use a suitable spine-leaf fabric with predictable equal-cost paths.
Incorrect Answers
A:LACP forms a logical link only when partner identities and member parameters agree.
B:Cost and reachability evidence validate topology choice.
C:Failover shows the single point of failure was addressed.
Question 121
A network specialist investigates this evidence: An analytics cluster generates heavy server-to-server traffic, and a three-tier hierarchy creates uneven paths. Which underlying condition BEST explains the observed failure or requirement?
- The topology adds unnecessary oversubscription for east-west flows.
- Pairwise full mesh grows links quadratically with site count.
- The network is small enough to combine core and distribution roles.
- Traffic crosses an internal to external network boundary.
Explanation
Correct Answer
A:The topology adds unnecessary oversubscription for east-west flows. Spine-leaf connects leaves through multiple spines for predictable east-west reachability.
Incorrect Answers
B:Pairwise full mesh grows links quadratically with site count. That does not establish the topology adds unnecessary oversubscription for east-west flows.
C:The network is small enough to combine core and distribution roles. That does not establish the topology adds unnecessary oversubscription for east-west flows.
D:Traffic crosses an internal to external network boundary. That does not establish the topology adds unnecessary oversubscription for east-west flows.
Question 122
A network team observes: A small office uses one central switch; its failure disconnects every desk, and management wants the simplest resilient change. What is the MOST appropriate corrective action or technical decision?
- Use a suitable spine-leaf fabric with predictable equal-cost paths.
- Provide redundant switching and uplinks appropriate to the availability target.
- Apply egress inspection and perimeter policy for north-south flows.
- Choose a scalable hub-spoke or SD-WAN overlay where policy and traffic fit.
Explanation
Correct Answer
B:A star's central device outage can isolate all connected endpoints. The sole central switching point is a single point of failure.
Incorrect Answers
A:The sole central switching point is a single point of failure.
C:Applying egress inspection and perimeter policy for north-south flows would not provide redundant switching and uplinks appropriate to the availability target.
D:Choosing a scalable hub-spoke or SD-WAN overlay where policy and traffic fit would not provide redundant switching and uplinks appropriate to the availability target.
Question 123
A network team addresses this situation: A small office uses one central switch; its failure disconnects every desk, and management wants the simplest resilient change. After the corrective action, which test or result BEST verifies that the problem is resolved?
- Try approved service paths and deny unauthorized lateral access.
- Measure leaf-to-leaf throughput and failover across spines.
- Simulate loss of a central uplink and verify continuity via the alternate.
- Measure throughput and round-trip latency between the buildings.
Explanation
Correct Answer
C:Failover shows the single point of failure was addressed. Verification of this result involves simulate loss of a central uplink and verify continuity via the alternate.
Incorrect Answers
A:Positive and negative tests confirm internal segmentation. That check cannot demonstrate simulate loss of a central uplink and verify continuity via the alternate.
B:Measure leaf-to-leaf throughput and failover across spines. That check cannot demonstrate simulate loss of a central uplink and verify continuity via the alternate.
D:Measure throughput and round-trip latency between the buildings. That check cannot demonstrate simulate loss of a central uplink and verify continuity via the alternate.
Question 124
A network specialist investigates this evidence: A small office uses one central switch; its failure disconnects every desk, and management wants the simplest resilient change. Which underlying condition BEST explains the observed failure or requirement?
- The requirement is a direct two-endpoint link.
- Traffic crosses an internal to external network boundary.
- Pairwise full mesh grows links quadratically with site count.
- The sole central switching point is a single point of failure.
Explanation
Correct Answer
D:The sole central switching point is a single point of failure. A star's central device outage can isolate all connected endpoints.
Incorrect Answers
A:The requirement is a direct two-endpoint link. That does not establish the sole central switching point is a single point of failure.
B:Traffic crosses an internal to external network boundary. That does not establish the sole central switching point is a single point of failure.
C:Pairwise full mesh grows links quadratically with site count. That does not establish the sole central switching point is a single point of failure.
Question 125
A network team observes: A company proposes direct dedicated circuits between each pair of 30 branch offices. What is the MOST appropriate corrective action or technical decision?
- Choose a scalable hub-spoke or SD-WAN overlay where policy and traffic fit.
- Deploy a point-to-point link sized for the distance and throughput.
- Enforce intra-data-center segmentation on service-to-service flows.
- Provide redundant switching and uplinks appropriate to the availability target.
Explanation
Correct Answer
A:Hub-and-spoke reduces the number of physical connections. Pairwise full mesh grows links quadratically with site count.
Incorrect Answers
B:Deploying a point-to-point link sized for the distance and throughput would not meet the need for a scalable hub-spoke or SD-WAN overlay where policy and traffic fit.
C:Enforcing intra-data-center segmentation on service-to-service flows would not meet the need for a scalable hub-spoke or SD-WAN overlay where policy and traffic fit.
D:Providing redundant switching and uplinks appropriate to the availability target would not meet the need for a scalable hub-spoke or SD-WAN overlay where policy and traffic fit.
Question 126
A network team addresses this situation: A company proposes direct dedicated circuits between each pair of 30 branch offices. After the corrective action, which test or result BEST verifies that the problem is resolved?
- Measure throughput and round-trip latency between the buildings.
- Model circuit count and verify branches communicate through approved hubs.
- Fail one aggregation switch and verify access uplinks converge.
- Measure leaf-to-leaf throughput and failover across spines.
Explanation
Correct Answer
B:Cost and reachability evidence validate topology choice. Verification of this result involves modeling circuit count and verify branches communicate through approved hubs.
Incorrect Answers
A:Measure throughput and round-trip latency between the buildings. That check cannot demonstrate model circuit count and verify branches communicate through approved hubs.
C:LACP forms a logical link only when partner identities and member parameters agree. Verification of this result involves modeling circuit count and verify branches communicate through approved hubs.
D:Measure leaf-to-leaf throughput and failover across spines. That check cannot demonstrate model circuit count and verify branches communicate through approved hubs.
Question 127
A network specialist investigates this evidence: A company proposes direct dedicated circuits between each pair of 30 branch offices. Which underlying condition BEST explains the observed failure or requirement?
- The requirement is a direct two-endpoint link.
- The sole central switching point is a single point of failure.
- Pairwise full mesh grows links quadratically with site count.
- The topology adds unnecessary oversubscription for east-west flows.
Explanation
Correct Answer
C:Pairwise full mesh grows links quadratically with site count. Hub-and-spoke reduces the number of physical connections.
Incorrect Answers
A:The requirement is a direct two-endpoint link. That does not establish pairwise full mesh grows links quadratically with site count.
B:The sole central switching point is a single point of failure. That does not establish pairwise full mesh grows links quadratically with site count.
D:The topology adds unnecessary oversubscription for east-west flows. That does not establish pairwise full mesh grows links quadratically with site count.
Question 128
A network team observes: Two nearby data-center buildings need a dedicated fixed low-latency interconnect without connecting additional sites. What is the MOST appropriate corrective action or technical decision?
- Use a redundant collapsed-core design with clear access-layer uplinks.
- Apply egress inspection and perimeter policy for north-south flows.
- Choose a scalable hub-spoke or SD-WAN overlay where policy and traffic fit.
- Deploy a point-to-point link sized for the distance and throughput.
Explanation
Correct Answer
D:Point-to-point topology directly joins exactly two endpoints. The requirement is a direct two-endpoint link.
Incorrect Answers
A:Using a redundant collapsed-core design with clear access-layer uplinks would not deploy a point-to-point link sized for the distance and throughput.
B:Applying egress inspection and perimeter policy for north-south flows would not deploy a point-to-point link sized for the distance and throughput.
C:Choosing a scalable hub-spoke or SD-WAN overlay where policy and traffic fit would not deploy a point-to-point link sized for the distance and throughput.
Question 129
A network team addresses this situation: Two nearby data-center buildings need a dedicated fixed low-latency interconnect without connecting additional sites. After the corrective action, which test or result BEST verifies that the problem is resolved?
- Measure throughput and round-trip latency between the buildings.
- Trace the path across boundary firewalls and verify egress logs.
- Fail one aggregation switch and verify access uplinks converge.
- Model circuit count and verify branches communicate through approved hubs.
Explanation
Correct Answer
A:Measure throughput and round-trip latency between the buildings.
Incorrect Answers
B:Stateful firewalls can distinguish permitted connection initiation from return traffic. It does not measure throughput and round-trip latency between the buildings.
C:LACP forms a logical link only when partner identities and member parameters agree. Verification of this result involves measuring throughput and round-trip latency between the buildings.
D:Cost and reachability evidence validate topology choice. It does not measure throughput and round-trip latency between the buildings.
Question 130
A network specialist investigates this evidence: Two nearby data-center buildings need a dedicated fixed low-latency interconnect without connecting additional sites. Which underlying condition BEST explains the observed failure or requirement?
- Traffic crosses an internal to external network boundary.
- The requirement is a direct two-endpoint link.
- The network is small enough to combine core and distribution roles.
- Pairwise full mesh grows links quadratically with site count.
Explanation
Correct Answer
B:The requirement is a direct two-endpoint link. Point-to-point topology directly joins exactly two endpoints.
Incorrect Answers
A:Traffic crosses an internal to external network boundary. That does not establish the requirement is a direct two-endpoint link.
C:The network is small enough to combine core and distribution roles. That does not establish the requirement is a direct two-endpoint link.
D:Pairwise full mesh grows links quadratically with site count. That does not establish the requirement is a direct two-endpoint link.
CompTIA Network+ (N10-009) Practice Tests