📋 Dynamic Host Configuration Protocol - CCNA Practice Questions

Learn DHCP operation (DORA process), DHCP server and relay agent configuration, DHCP snooping, and how to troubleshoot DHCP issues in enterprise networks.

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CCNA DHCP Question Bank (9 Questions)

Browse all 9 practice questions covering Dynamic Host Configuration Protocol for the CCNA certification exam. Answers are intentionally hidden on this page so you can self-test first before checking results in quiz mode.

  1. Question 1IP Services

    Why is a DHCP relay agent (ip helper-address) needed?

    ATo encrypt DHCP traffic
    BDHCP Discover is a broadcast that doesn't cross routers; the relay agent forwards it as unicast to the DHCP server on a different subnet
    CTo provide DNS services
    DTo assign static IPs

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  2. Question 2Security Fundamentals

    Which ports are classified as trusted in DHCP snooping?

    AAll access ports
    BPorts connected to DHCP servers and uplinks
    CPorts connected to end-user devices
    DAll trunk ports automatically

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  3. Question 3Select All That ApplyIP Services

    Which two features work together to prevent ARP spoofing attacks on a switch? (Choose two)

    ADHCP snooping
    BDynamic ARP Inspection
    CPort security
    DBPDU Guard

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  4. Question 4Network Access

    What information is stored in the DHCP snooping binding table?

    AOnly MAC addresses
    BMAC address, IP address, VLAN, port, and lease time for each client that obtained an IP via DHCP on untrusted ports
    COnly IP addresses
    DOnly VLAN assignments

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  5. Question 5Security Fundamentals

    How does DHCP snooping protect against rogue DHCP servers?

    AIt encrypts DHCP traffic
    BIt designates ports as trusted (toward legitimate DHCP server) or untrusted; DHCP server responses from untrusted ports are dropped
    CIt blocks all DHCP traffic
    DIt requires static IP addresses

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  6. Question 6IP Services

    Which DHCP message is sent by the client to discover available DHCP servers?

    ADHCPOFFER
    BDHCPREQUEST
    CDHCPDISCOVER
    DDHCPACK

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  7. Question 7IP Services

    What are the four steps of the DHCP DORA process?

    ADNS, OSPF, RIP, ARP
    BDiscover (client broadcast), Offer (server unicast), Request (client broadcast), Acknowledge (server unicast)
    CDownload, Open, Read, Apply
    DDetect, Organize, Route, Assign

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  8. Question 8IP Services

    A network administrator needs to forward DHCP broadcast requests across router interfaces to reach a DHCP server on a different subnet. Which feature should be configured?

    ADHCP pool on the router
    BIP helper-address (DHCP relay)
    CNAT overload
    DProxy ARP

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  9. Question 9IP Services

    A company's DHCP server assigns an IP address to a client. Which message sequence correctly describes the DHCP DORA process?

    ADiscover → Offer → Request → Acknowledge
    BDiscover → Request → Offer → Acknowledge
    CRequest → Discover → Offer → Acknowledge
    DDiscover → Offer → Acknowledge → Request

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Key DHCP Concepts for CCNA

dhcpdoradiscoverofferrequestacknowledgerelay agentdhcp snoopingip helper

CCNA DHCP Exam Tips

Dynamic Host Configuration Protocol questions in CCNA are typically scenario-based. Focus on network fundamentals, IP connectivity, security basics, and automation concepts. Priority concepts: dhcp, dora, discover, offer, request, acknowledge.

What CCNA Expects

  • Anchor your answer in choose the configuration that correctly applies to the described network topology and requirements.
  • DHCP scenarios for CCNA are frequently mapped to Domain 4 (10%), so read the objective carefully before picking controls or architecture.
  • Expect multi-topic scenarios where DHCP interacts with routing, switching, security, or automation patterns rather than appearing as an isolated question.
  • When two options are both technically valid, prefer the choice that best aligns with the exam's operational scope (Associate) and vendor best practices.

High-Value DHCP Concepts

  • Know the core DHCP building blocks cold: dhcp, dora, discover, offer.
  • Review the edge-case features and limits for request, acknowledge; these details are commonly used to differentiate answer choices.
  • Practice service-integration reasoning: how DHCP pairs with IP Addressing, Switching, Security Fundamentals in real deployment patterns.
  • For CCNA, explain why the chosen DHCP design meets reliability, security, and cost expectations better than the alternatives.

Common CCNA Traps

  • Watch for confusing similar protocols or mixing Layer 2 and Layer 3 behavior.
  • Questions in IP Services often include distractors that look correct for DHCP but violate security policy, convergence, or redundancy requirements.
  • Avoid picking options purely by feature name; validate data path, failure handling, and governance impact before answering.
  • If the prompt hints at automation or repeatability, eliminate manual-only operational answers first.

Fast Review Checklist

  • Can you compare at least two DHCP implementation paths and justify which one best fits the scenario?
  • Can you map the chosen answer back to IP Services (10%) outcomes for CCNA?
  • Can you explain security and access boundaries for DHCP without relying on default-open assumptions?
  • Can you describe how DHCP integrates with IP Addressing and Switching during failure, scaling, and monitoring events?

Exam Domains Covering DHCP

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