AZ-104 Implement and Manage Virtual Networking Practice Question
Which two statements accurately describe the value of centralized DHCP in enterprise networks?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It can reduce the need to maintain separate DHCP servers in every subnet or site.
Centralized DHCP can simplify operations by keeping address assignment services in a more controlled central location rather than distributing separate servers everywhere. In practical terms, this can reduce administration overhead and make policy changes easier. The tradeoff is that Layer 3 boundaries must then be handled properly so client requests can still reach the server. This is why DHCP relay becomes important in many campus and branch designs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It can reduce the need to maintain separate DHCP servers in every subnet or site.
Why this is correct
Centralizing DHCP on a single server or a small cluster eliminates the operational overhead and administrative burden of deploying and patching separate DHCP servers in every physical segment or branch office. Instead of maintaining per-subnet authorization, database backups, and failover configurations across many hosts, admins can manage one service that serves multiple scopes. This simplification lowers hardware and licensing costs and makes consistent DHCP policy enforcement much easier.
- ✓
It can make address-policy changes easier to manage from a central location.
Why this is correct
When DHCP is centralized, IP address range modifications, option settings (like DNS or NTP), and reservation updates are changed once in a central console, rather than duplicated across dozens of remote servers. This reduces configuration drift because every subnet's scope is defined and version-controlled in one place. Centralized monitoring and reporting also let admins quickly identify utilization or conflict issues across the entire network without logging into each site server.
- ✗
It removes the need for relay across Layer 3 boundaries.
Why it's wrong here
Centralizing DHCP does not eliminate the need for DHCP relay (or DHCP snooping with relay) because clients send broadcast-based DHCPDISCOVER messages that do not cross routers by default. A centralized server located on a different subnet requires an IP helper-address or relay agent on each routed interface to forward those broadcasts as unicast to the server. Thus centralization actually makes relay more necessary, not less.
When this WOULD be correct
If the exam question stated that a centralized DHCP server is implemented within a single subnet without any Layer 3 segmentation, then option C would be correct as there would be no need for relay agents in that scenario.
- ✗
It eliminates the need for default gateways.
Why it's wrong here
DHCP assigns IP configuration, but a default gateway is a separate routing parameter that clients must have in their routing table to reach off-subnet destinations. Centralizing the DHCP service does not change that clients still need a valid gateway address (either from DHCP options or static config) to communicate beyond their local segment. Without a default gateway, even correctly addressed hosts can only send to devices on the same subnet, so the service cannot replace routing.
When this WOULD be correct
If the exam question stated that centralized DHCP is implemented in a network where all devices are on the same subnet, and no routing is required, then it could be argued that default gateways are not necessary, making this option correct in that specific context.
- ✗
It is useful only on wireless networks.
Why it's wrong here
Centralized DHCP is valuable for all types of enterprise networks, including wired LANs, data center virtual networks, and site-to-site VPN clients, not just wireless. Wireless networks were early adopters of centralization because roaming clients need unified addressing, but wired networks benefit equally from centralized management, unified options, and reduced in-branch footprint. The protocol itself is transport-agnostic; any device that sends a broadcast DHCP discover can be served by a central server through relay.
When this WOULD be correct
If the exam question specifically asked about the advantages of DHCP in wireless networks only, stating that centralized DHCP is useful solely for wireless networks could be correct. For example, a question could focus on how centralized DHCP simplifies management in large wireless deployments.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓It can reduce the need to maintain separate DHCP servers in every subnet or site.Correct answer▾
Why this is correct
Centralizing DHCP on a single server or a small cluster eliminates the operational overhead and administrative burden of deploying and patching separate DHCP servers in every physical segment or branch office. Instead of maintaining per-subnet authorization, database backups, and failover configurations across many hosts, admins can manage one service that serves multiple scopes. This simplification lowers hardware and licensing costs and makes consistent DHCP policy enforcement much easier.
✗It removes the need for relay across Layer 3 boundaries.Wrong answer — click to see why▾
Why this is wrong here
This option is wrong because centralized DHCP can still require DHCP relay agents to forward requests across Layer 3 boundaries, especially when clients and servers are on different subnets.
★ When this WOULD be the correct answer
If the exam question stated that a centralized DHCP server is implemented within a single subnet without any Layer 3 segmentation, then option C would be correct as there would be no need for relay agents in that scenario.
Why candidates choose this
Candidates may be tempted by this option due to a misunderstanding of how DHCP operates across different network layers, mistakenly believing that centralization inherently eliminates the need for relay agents.
✗It eliminates the need for default gateways.Wrong answer — click to see why▾
Why this is wrong here
This option is wrong because centralized DHCP does not eliminate the need for default gateways; devices still require a default gateway to communicate outside their local subnet regardless of DHCP configuration.
★ When this WOULD be the correct answer
If the exam question stated that centralized DHCP is implemented in a network where all devices are on the same subnet, and no routing is required, then it could be argued that default gateways are not necessary, making this option correct in that specific context.
Why candidates choose this
Candidates may choose this option due to a misunderstanding of DHCP's role in network configuration, mistakenly believing that centralizing DHCP would simplify or negate the need for default gateways in all scenarios.
✗It is useful only on wireless networks.Wrong answer — click to see why▾
Why this is wrong here
This option is wrong because centralized DHCP is beneficial for both wired and wireless networks, not limited to just wireless environments. Centralized DHCP can manage IP addresses across all types of network infrastructures.
★ When this WOULD be the correct answer
If the exam question specifically asked about the advantages of DHCP in wireless networks only, stating that centralized DHCP is useful solely for wireless networks could be correct. For example, a question could focus on how centralized DHCP simplifies management in large wireless deployments.
Why candidates choose this
Candidates might choose this option due to a common misconception that centralized services are primarily associated with wireless networks, especially in discussions about mobility and device management, leading to a knowledge gap regarding its broader applicability.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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Related to this question
Learn chapter
Azure Policy and Initiatives
Key term
DHCP
Dynamic Host Configuration Protocol (DHCP) automatically assigns IP addresses and network settings to devices on a network, so they can communicate without manual configuration.
Key term
Policy
A policy is a set of rules or guidelines that defines how an organization manages, secures, and operates its IT systems and services.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-104 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-104 exam.