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Question 40
A floor sends growing video traffic through two compatible uplinks and needs a managed bundle. Which feature should be evaluated?
- Multi-gigabit access capability
- PoE budget calculation
- Link aggregation for uplinks
- Access-port density planning
Explanation
Correct Answer
C:LACP offers a logical uplink bundle when peers agree. Aggregating compatible uplinks can increase aggregate bandwidth and improve member resilience.
Incorrect Answers
A:Fast AP uplinks may require 2.5G or 5G access port support rather than basic gigabit ports. But this does not address the case requirement to aggregate parallel supported uplink connections.
B:Total switch PoE capacity must accommodate the simultaneous power demand and reserve of attached powered devices. But this does not address the case requirement to aggregate parallel supported uplink connections.
D:Port count must include expected endpoints, growth and spare ports per closet. But this does not address the case requirement to aggregate parallel supported uplink connections.
Question 41
A purchase list exactly matches today's 48 desktops but ignores new phones and printers. What requirement is missing?
- PoE budget calculation
- Multi-gigabit access capability
- Access-port density planning
- Link aggregation for uplinks
Explanation
Correct Answer
C:Physical port capacity must include all devices and reserve. Port count must include expected endpoints, growth and spare ports per closet.
Incorrect Answers
A:Total switch PoE capacity must accommodate the simultaneous power demand and reserve of attached powered devices. But this does not address the case requirement to avoid immediate port exhaustion after rollout.
B:Fast AP uplinks may require 2.5G or 5G access port support rather than basic gigabit ports. But this does not address the case requirement to avoid immediate port exhaustion after rollout.
D:Aggregating compatible uplinks can increase aggregate bandwidth and improve member resilience. But this does not address the case requirement to avoid immediate port exhaustion after rollout.
Question 42
A phone and an attached PC use one access connection but need different treatment. What configuration concept matters?
- Protected voice and data segmentation
- Access-port density planning
- Per-port PoE class support
- Multi-gigabit access capability
Explanation
Correct Answer
A:Appropriate endpoint VLAN and QoS classification separates their traffic needs. Phones and computers may need appropriate VLAN assignment and traffic treatment.
Incorrect Answers
B:Port count must include expected endpoints, growth and spare ports per closet. But this does not address the case requirement to identify voice and data service requirements at the edge.
C:The physical port must support the required PoE mode and negotiated device draw. But this does not address the case requirement to identify voice and data service requirements at the edge.
D:Fast AP uplinks may require 2.5G or 5G access port support rather than basic gigabit ports. But this does not address the case requirement to identify voice and data service requirements at the edge.
Question 43
A design counts 1000W of nominal switch power but only 740W allocated for PoE. Which figure matters for 28W powered devices?
- Multi-gigabit access capability
- Link aggregation for uplinks
- PoE budget calculation
- Per-port PoE class support
Explanation
Correct Answer
C:PoE allocation, not total chassis supply wattage, constrains PD load. Total switch PoE capacity must accommodate the simultaneous power demand and reserve of attached powered devices.
Incorrect Answers
A:Fast AP uplinks may require 2.5G or 5G access port support rather than basic gigabit ports. But this does not address the case requirement to ensure available PoE watts exceed simultaneous PD demand.
B:Aggregating compatible uplinks can increase aggregate bandwidth and improve member resilience. But this does not address the case requirement to ensure available PoE watts exceed simultaneous PD demand.
D:The physical port must support the required PoE mode and negotiated device draw. But this does not address the case requirement to ensure available PoE watts exceed simultaneous PD demand.
Question 44
Twenty-five new cameras arrive at a 24-port closet switch. What planning flaw appears before any protocol test?
- Link aggregation for uplinks
- Per-port PoE class support
- Access-port density planning
- Protected voice and data segmentation
Explanation
Correct Answer
C:Not enough physical access interfaces exist. Port count must include expected endpoints, growth and spare ports per closet.
Incorrect Answers
A:Aggregating compatible uplinks can increase aggregate bandwidth and improve member resilience. But this does not address the case requirement to size the closet for the actual endpoint count.
B:The physical port must support the required PoE mode and negotiated device draw. But this does not address the case requirement to size the closet for the actual endpoint count.
D:Phones and computers may need appropriate VLAN assignment and traffic treatment. But this does not address the case requirement to size the closet for the actual endpoint count.
Question 45
A high-power AP keeps power-cycling on an older PoE port despite stable link speed. What should be checked first?
- Protected voice and data segmentation
- Multi-gigabit access capability
- Link aggregation for uplinks
- Per-port PoE class support
Explanation
Correct Answer
D:Negotiated power class and per-port limits may be insufficient. The physical port must support the required PoE mode and negotiated device draw.
Incorrect Answers
A:Phones and computers may need appropriate VLAN assignment and traffic treatment. But this does not address the case requirement to match port power capability to device requirements.
B:Fast AP uplinks may require 2.5G or 5G access port support rather than basic gigabit ports. But this does not address the case requirement to match port power capability to device requirements.
C:Aggregating compatible uplinks can increase aggregate bandwidth and improve member resilience. But this does not address the case requirement to match port power capability to device requirements.
Question 46
A building interconnect spans several kilometers and the existing cable is single-mode. What physical choice should be validated?
- Single-mode optical reach selection
- Speed negotiation compatibility
- Multi-mode optic suitability
- Optical power and loss budget
Explanation
Correct Answer
A:Select supported long-reach optics with matching wavelength and connector. Longer fiber paths generally require supported single-mode optics and compatible wavelength at both ends.
Incorrect Answers
B:Both ends and their modules must support a common physical speed and settings. But this does not address the case requirement to carry traffic across the long single-mode run.
C:Short-building fiber runs can use compatible multi-mode optics within their supported distance. But this does not address the case requirement to carry traffic across the long single-mode run.
D:Actual fiber loss, connector quality and transceiver receive thresholds determine optical link feasibility. But this does not address the case requirement to carry traffic across the long single-mode run.
Question 47
A short datacenter fiber run uses multi-mode patching, yet the bill of materials assumes long-reach SM optics. What should be reviewed?
- Optical power and loss budget
- Diverse fiber path routing
- Copper Ethernet reach planning
- Multi-mode optic suitability
Explanation
Correct Answer
D:Media type and optical standards must match the installed cable. Short-building fiber runs can use compatible multi-mode optics within their supported distance.
Incorrect Answers
A:Actual fiber loss, connector quality and transceiver receive thresholds determine optical link feasibility. But this does not address the case requirement to use optics compatible with multi-mode fiber.
B:Separating redundant fiber routes reduces simultaneous physical damage risk. But this does not address the case requirement to use optics compatible with multi-mode fiber.
C:Twisted-pair Ethernet has category and distance limits that must be respected for stable links. But this does not address the case requirement to use optics compatible with multi-mode fiber.
Question 48
A copper uplink must cross 180 meters between cabinets on ordinary twisted pair. Which constraint requires redesign?
- Diverse fiber path routing
- Copper Ethernet reach planning
- Optical power and loss budget
- Speed negotiation compatibility
Explanation
Correct Answer
B:Standard copper Ethernet channel limits are exceeded. Twisted-pair Ethernet has category and distance limits that must be respected for stable links.
Incorrect Answers
A:Separating redundant fiber routes reduces simultaneous physical damage risk. But this does not address the case requirement to fit the physical transmission within rated distance.
C:Actual fiber loss, connector quality and transceiver receive thresholds determine optical link feasibility. But this does not address the case requirement to fit the physical transmission within rated distance.
D:Both ends and their modules must support a common physical speed and settings. But this does not address the case requirement to fit the physical transmission within rated distance.
Question 49
One SFP port operates at 10G and the peer supports only 1G with no common negotiation mode. What explains the lack of link?
- Optical power and loss budget
- Single-mode optical reach selection
- Speed negotiation compatibility
- Multi-mode optic suitability
Explanation
Correct Answer
C:Physical speeds must be mutually supported. Both ends and their modules must support a common physical speed and settings.
Incorrect Answers
A:Actual fiber loss, connector quality and transceiver receive thresholds determine optical link feasibility. But this does not address the case requirement to establish matching operational link speed.
B:Longer fiber paths generally require supported single-mode optics and compatible wavelength at both ends. But this does not address the case requirement to establish matching operational link speed.
D:Short-building fiber runs can use compatible multi-mode optics within their supported distance. But this does not address the case requirement to establish matching operational link speed.
Question 50
A new fiber circuit reports many CRC and light-level events despite matching connector type. Which assessment is relevant?
- Diverse fiber path routing
- Multi-mode optic suitability
- Copper Ethernet reach planning
- Optical power and loss budget
Explanation
Correct Answer
D:Measure receive power and optical attenuation against transceiver limits. Actual fiber loss, connector quality and transceiver receive thresholds determine optical link feasibility.
Incorrect Answers
A:Separating redundant fiber routes reduces simultaneous physical damage risk. But this does not address the case requirement to verify the end-to-end optical link budget.
B:Short-building fiber runs can use compatible multi-mode optics within their supported distance. But this does not address the case requirement to verify the end-to-end optical link budget.
C:Twisted-pair Ethernet has category and distance limits that must be respected for stable links. But this does not address the case requirement to verify the end-to-end optical link budget.
HPE Network Switching Professional (HPE7-A08) Practice Tests