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hardmultiple choiceObjective-mapped

A network team centralizes DHCP in a data center. Users in a remote branch stop receiving addresses after the branch router is replaced. Which missing configuration on the branch gateway is the strongest suspect?

Question 1hardmultiple choice
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A network team centralizes DHCP in a data center. Users in a remote branch stop receiving addresses after the branch router is replaced. Which missing configuration on the branch gateway is the strongest suspect?

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Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

A

Best answer

DHCP relay or helper configuration on the client-facing gateway interface

This is correct because centralized DHCP depends on the local gateway relaying the broadcast requests.

B

Distractor review

A spanning-tree priority change on the branch switch

This is wrong because STP priority does not relay DHCP requests.

C

Distractor review

A CAPWAP tunnel from the branch PCs to the data center

This is wrong because CAPWAP is not used for branch client DHCP relay.

D

Distractor review

A voice VLAN configuration on the WAN interface

This is wrong because voice VLAN settings do not solve centralized DHCP relay.

Common exam trap

Common exam trap: an active trunk can still block the VLAN you need

A trunk being up does not prove every VLAN is crossing it. Check allowed VLAN lists, native VLAN mismatch, VLAN existence and access-port assignment.

Technical deep dive

How to think about this question

VLAN questions usually combine access-port and trunking clues. The key is to identify whether the issue is local to one switchport, caused by the trunk, or caused by the VLAN not existing where it needs to exist.

KKey Concepts to Remember

  • Access ports place end devices into a single VLAN.
  • Trunk ports carry multiple VLANs between switches.
  • Allowed VLAN lists decide which VLANs can cross a trunk.
  • Native VLAN mismatch can create confusing symptoms.

TExam Day Tips

  • Use show vlan brief to verify access VLANs.
  • Use show interfaces trunk to verify trunk state and allowed VLANs.
  • Do not treat every same-VLAN issue as a routing problem.

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More questions from this exam

Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.

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Question 3

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Question 4

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Question 5

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Question 6

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FAQ

Questions learners often ask

What does this AZ-104 question test?

Access ports place end devices into a single VLAN.

What is the correct answer to this question?

The correct answer is: DHCP relay or helper configuration on the client-facing gateway interface — The strongest suspect is missing DHCP relay configuration on the client-facing gateway interface. In practical terms, client DHCP discovery is broadcast traffic and will not cross a Layer 3 boundary on its own. When DHCP is centralized, the local gateway must relay those requests toward the remote server. This is one of the most practical enterprise troubleshooting patterns because the branch can look connected while only dynamic host configuration fails.

What should I do if I get this AZ-104 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.

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