N10-009 Networking Concepts Practice Question
A network administrator wants to automate IP address assignment for client devices. Which protocol should be used?
⚠ Common exam trap
CompTIA often tests the distinction between DHCP for address assignment and DNS for name resolution, leading candidates to confuse the two when the question mentions 'automating IP address assignment'.
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
✓
DHCP
DHCP (Dynamic Host Configuration Protocol) automates IP address assignment by leasing IP configurations to client devices from a defined pool. This eliminates the need for manual static IP configuration, making it the correct protocol for automated IP address management.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DHCP
Why this is correct
DHCP (Dynamic Host Configuration Protocol) is the foundational network protocol for automatically assigning IP addresses and other crucial network configuration parameters to client devices. Upon booting or connecting to a network, a client initiates a DHCP discovery process to obtain an IP address, subnet mask, default gateway, and DNS server information from a DHCP server. This automation significantly reduces administrative overhead and prevents IP address conflicts, ensuring efficient network operation.
- ✗
DNS
Why it's wrong here
DNS (Domain Name System) serves as the internet's phonebook, primarily translating human-readable domain names, such as www.example.com, into numerical IP addresses that computers use to identify each other on a network. While essential for navigating the internet and accessing resources by name, DNS does not play any role in the assignment or dynamic provisioning of IP addresses to client devices. Its function is purely resolution, not configuration.
When this WOULD be correct
When a question asks which protocol translates a domain name like 'example.com' into an IP address, DNS is the correct answer.
- ✗
ARP
Why it's wrong here
ARP (Address Resolution Protocol) operates within a local network segment to dynamically map a known IP address to its corresponding physical MAC (Media Access Control) address. When a device needs to communicate with another device on the same local network and only knows its IP address, ARP broadcasts a request to discover the MAC address. This process facilitates Layer 2 communication after an IP address has already been assigned, but ARP itself does not assign or manage IP addresses.
When this WOULD be correct
When a question asks which protocol is used to resolve a known IP address to its corresponding MAC address on a local network segment, ARP is the correct answer.
- ✗
ICMP
Why it's wrong here
ICMP (Internet Control Message Protocol) is a network layer protocol used for sending control messages and error reports, crucial for network diagnostics and operational feedback. Protocols like 'ping' and 'traceroute' leverage ICMP messages to test host reachability and trace network paths, respectively. However, ICMP's purpose is strictly limited to reporting and diagnostic functions, and it has no mechanism or capability for assigning IP addresses or other network configuration details to end devices.
When this WOULD be correct
A question asking which protocol is used to test network connectivity or report errors, such as 'Which protocol does the ping command use?' would make ICMP the correct answer.
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 N10-009 exam frequently reuses these exact scenarios with slightly different constraints.
✓DHCPCorrect answer▾
Why this is correct
DHCP (Dynamic Host Configuration Protocol) is the foundational network protocol for automatically assigning IP addresses and other crucial network configuration parameters to client devices. Upon booting or connecting to a network, a client initiates a DHCP discovery process to obtain an IP address, subnet mask, default gateway, and DNS server information from a DHCP server. This automation significantly reduces administrative overhead and prevents IP address conflicts, ensuring efficient network operation.
✗DNSWrong answer — click to see why▾
Why this is wrong here
DNS resolves domain names to IP addresses, but does not automate IP address assignment for client devices.
★ When this WOULD be the correct answer
When a question asks which protocol translates a domain name like 'example.com' into an IP address, DNS is the correct answer.
Why candidates choose this
Candidates may confuse DNS with DHCP because both involve IP addresses and are commonly used in network configuration.
✗ARPWrong answer — click to see why▾
Why this is wrong here
ARP (Address Resolution Protocol) is used to map IP addresses to MAC addresses on a local network, not to automate IP address assignment for client devices.
★ When this WOULD be the correct answer
When a question asks which protocol is used to resolve a known IP address to its corresponding MAC address on a local network segment, ARP is the correct answer.
Why candidates choose this
Candidates may confuse ARP with DHCP because both involve IP addresses, but ARP deals with mapping, not assignment.
✗ICMPWrong answer — click to see why▾
Why this is wrong here
ICMP is used for network diagnostics and error reporting (e.g., ping, traceroute), not for automating IP address assignment. DHCP is the correct protocol for dynamic IP allocation.
★ When this WOULD be the correct answer
A question asking which protocol is used to test network connectivity or report errors, such as 'Which protocol does the ping command use?' would make ICMP the correct answer.
Why candidates choose this
Candidates may confuse ICMP with a protocol that manages network addresses because both involve IP communication, or they might think ICMP can assign addresses due to its role in network layer operations.
Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Visual reference
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Related to this question
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Network Virtualization and VXLAN
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
Internet Protocol Address Management
Internet Protocol Address Management (IPAM) is the practice of planning, tracking, and managing the assignment and use of IP addresses on a network to ensure devices can communicate without conflict.
About these practice questions
Courseiva writes every N10-009 question from scratch — 464 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This N10-009 practice question is part of Courseiva's free CompTIA 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 N10-009 exam.