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HP HPE7-A08 Practice Test 79

Question 780

No errors or optical warnings appear, but show interface reports administratively down on a commissioned link. What state requires review?

  1. Measure optic receive and transmit power
  2. Check link up/down transition counters
  3. Measure interface utilization and discards
  4. Inspect administrative enable state

Explanation

Correct Answer

D:

The shutdown configuration prevents link forwarding. A disabled port cannot forward regardless of optical health or learned VLAN configuration.

Incorrect Answers

A:

Light-level readings help verify the optical budget and identify attenuation or failed transceivers. But this does not address the case requirement to identify intentional port disable.

B:

Many interface transitions indicate flapping that can interrupt sessions despite low average utilization. But this does not address the case requirement to identify intentional port disable.

C:

A port near line rate with egress drops calls for capacity and queue analysis. But this does not address the case requirement to identify intentional port disable.

Question 781

After patching a new optic, FCS counters keep climbing even as the link says up. What counters drive escalation?

  1. Review negotiated link speed
  2. Inspect CRC and FCS corruption
  3. Inspect administrative enable state
  4. Check link up/down transition counters

Explanation

Correct Answer

B:

Continued frame corruption means the repair is not complete. Increasing frame-check errors indicate signal or medium defects and justify targeted physical inspection.

Incorrect Answers

A:

The observed operating rate may be below design due to cabling, transceiver or endpoint limitations. But this does not address the case requirement to use error trends to validate health.

C:

A disabled port cannot forward regardless of optical health or learned VLAN configuration. But this does not address the case requirement to use error trends to validate health.

D:

Many interface transitions indicate flapping that can interrupt sessions despite low average utilization. But this does not address the case requirement to use error trends to validate health.

Question 782

A long uplink degrades after a splice and its RX power falls markedly. Which metric should be compared to module specifications?

  1. Measure optic receive and transmit power
  2. Check link up/down transition counters
  3. Inspect administrative enable state
  4. Measure interface utilization and discards

Explanation

Correct Answer

A:

Actual receive-light levels versus supported threshold. Light-level readings help verify the optical budget and identify attenuation or failed transceivers.

Incorrect Answers

B:

Many interface transitions indicate flapping that can interrupt sessions despite low average utilization. But this does not address the case requirement to identify insufficient optical budget.

C:

A disabled port cannot forward regardless of optical health or learned VLAN configuration. But this does not address the case requirement to identify insufficient optical budget.

D:

A port near line rate with egress drops calls for capacity and queue analysis. But this does not address the case requirement to identify insufficient optical budget.

Question 783

Heavy transfers cause packets dropped on an otherwise error-free 1G port at maximum throughput. What is the likely operational action?

  1. Check link up/down transition counters
  2. Measure interface utilization and discards
  3. Inspect CRC and FCS corruption
  4. Review negotiated link speed

Explanation

Correct Answer

B:

Analyze egress capacity and queue demand. A port near line rate with egress drops calls for capacity and queue analysis.

Incorrect Answers

A:

Many interface transitions indicate flapping that can interrupt sessions despite low average utilization. But this does not address the case requirement to address sustained oversubscription.

C:

Increasing frame-check errors indicate signal or medium defects and justify targeted physical inspection. But this does not address the case requirement to address sustained oversubscription.

D:

The observed operating rate may be below design due to cabling, transceiver or endpoint limitations. But this does not address the case requirement to address sustained oversubscription.

Question 784

A LAG shows three members up but one lacks LACP distributing flag. What status matters for deciding whether it carries payloads?

  1. Inspect LAG utilization and hash distribution
  2. Check collecting and distributing flags
  3. Check physical member errors
  4. Review active versus passive negotiation

Explanation

Correct Answer

B:

Validate LACP collecting and distributing state on that member. Healthy LACP members should be eligible to collect and distribute packets in their negotiated aggregate.

Incorrect Answers

A:

Hash-based balancing can overload one member for a large single flow despite available total capacity. But this does not address the case requirement to confirm real bundle participation.

C:

A bundle may be logically up while one member corrupts or drops packets intermittently. But this does not address the case requirement to confirm real bundle participation.

D:

Two passive peers can fail to establish the expected dynamically negotiated bundle. But this does not address the case requirement to confirm real bundle participation.

Question 785

Two aggregation endpoints both run passive LACP and no member becomes active. What negotiation detail explains this?

  1. Inspect LAG utilization and hash distribution
  2. Review active versus passive negotiation
  3. Compare allowed VLAN and member settings
  4. Review minimum links and bundle oper state

Explanation

Correct Answer

B:

A passive/passive pair may not initiate LACP negotiation. Two passive peers can fail to establish the expected dynamically negotiated bundle.

Incorrect Answers

A:

Hash-based balancing can overload one member for a large single flow despite available total capacity. But this does not address the case requirement to identify link aggregation mode mismatch.

C:

Inconsistent speed, VLAN or port attributes can prevent member participation in a bundle. But this does not address the case requirement to identify link aggregation mode mismatch.

D:

A minimum-members policy can take the entire logical LAG down when too few members remain. But this does not address the case requirement to identify link aggregation mode mismatch.

Question 786

One physical member is excluded after an allowed-VLAN change differs from the rest. Which configuration should be compared?

  1. Review active versus passive negotiation
  2. Check physical member errors
  3. Check collecting and distributing flags
  4. Compare allowed VLAN and member settings

Explanation

Correct Answer

D:

Check that LAG members have compatible VLAN and port attributes. Inconsistent speed, VLAN or port attributes can prevent member participation in a bundle.

Incorrect Answers

A:

Two passive peers can fail to establish the expected dynamically negotiated bundle. But this does not address the case requirement to identify member inconsistency.

B:

A bundle may be logically up while one member corrupts or drops packets intermittently. But this does not address the case requirement to identify member inconsistency.

C:

Healthy LACP members should be eligible to collect and distribute packets in their negotiated aggregate. But this does not address the case requirement to identify member inconsistency.

Question 787

A 20G two-member LAG delivers 10G to one elephant flow while another member is idle. What behavior should be considered?

  1. Review minimum links and bundle oper state
  2. Review active versus passive negotiation
  3. Inspect LAG utilization and hash distribution
  4. Check physical member errors

Explanation

Correct Answer

C:

Traffic hashing may keep a single flow on one physical member. Hash-based balancing can overload one member for a large single flow despite available total capacity.

Incorrect Answers

A:

A minimum-members policy can take the entire logical LAG down when too few members remain. But this does not address the case requirement to interpret uneven LAG distribution.

B:

Two passive peers can fail to establish the expected dynamically negotiated bundle. But this does not address the case requirement to interpret uneven LAG distribution.

D:

A bundle may be logically up while one member corrupts or drops packets intermittently. But this does not address the case requirement to interpret uneven LAG distribution.

Question 788

Users see intermittent loss on a LAG with one port showing high FCS errors. Which evidence should be isolated?

  1. Review active versus passive negotiation
  2. Check physical member errors
  3. Inspect LAG utilization and hash distribution
  4. Review minimum links and bundle oper state

Explanation

Correct Answer

B:

A degraded member can corrupt traffic inside an otherwise functioning aggregate. A bundle may be logically up while one member corrupts or drops packets intermittently.

Incorrect Answers

A:

Two passive peers can fail to establish the expected dynamically negotiated bundle. But this does not address the case requirement to identify member physical defect.

C:

Hash-based balancing can overload one member for a large single flow despite available total capacity. But this does not address the case requirement to identify member physical defect.

D:

A minimum-members policy can take the entire logical LAG down when too few members remain. But this does not address the case requirement to identify member physical defect.

Question 789

A LAG needs two live members by policy; after one fails, the logical interface shuts despite one remaining. What state explains it?

  1. Review minimum links and bundle oper state
  2. Inspect LAG utilization and hash distribution
  3. Check physical member errors
  4. Compare allowed VLAN and member settings

Explanation

Correct Answer

A:

Minimum-links requirement is no longer satisfied. A minimum-members policy can take the entire logical LAG down when too few members remain.

Incorrect Answers

B:

Hash-based balancing can overload one member for a large single flow despite available total capacity. But this does not address the case requirement to interpret aggregate operational threshold.

C:

A bundle may be logically up while one member corrupts or drops packets intermittently. But this does not address the case requirement to interpret aggregate operational threshold.

D:

Inconsistent speed, VLAN or port attributes can prevent member participation in a bundle. But this does not address the case requirement to interpret aggregate operational threshold.

Question 790

A LAG has one member in standby without collecting flag, while aggregate status is up. What should the operator inspect?

  1. Check collecting and distributing flags
  2. Review minimum links and bundle oper state
  3. Check physical member errors
  4. Inspect LAG utilization and hash distribution

Explanation

Correct Answer

A:

Member-specific LACP state instead of just aggregate up/down. Healthy LACP members should be eligible to collect and distribute packets in their negotiated aggregate.

Incorrect Answers

B:

A minimum-members policy can take the entire logical LAG down when too few members remain. But this does not address the case requirement to identify inactive data-path member.

C:

A bundle may be logically up while one member corrupts or drops packets intermittently. But this does not address the case requirement to identify inactive data-path member.

D:

Hash-based balancing can overload one member for a large single flow despite available total capacity. But this does not address the case requirement to identify inactive data-path member.

HPE Network Switching Professional (HPE7-A08) Practice Tests

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