🔢 IPv4 & IPv6 Addressing - CCNA Practice Questions

Learn IPv4 subnetting, CIDR notation, VLSM, private vs public addressing, IPv6 address types, and how to calculate network addresses, broadcast addresses, and host ranges.

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CCNA IP Addressing Question Bank (14 Questions)

Browse all 14 practice questions covering IPv4 & IPv6 Addressing 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 Connectivity

    What is the broadcast address for the subnet 172.16.32.0/20?

    A172.16.32.255
    B172.16.47.255 — the /20 subnet spans 172.16.32.0 to 172.16.47.255 (4096 addresses)
    C172.16.63.255
    D172.16.255.255

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  2. Question 2Network Fundamentals

    A network administrator needs to create 14 subnets from the 172.16.0.0/16 network. What is the most efficient subnet mask to use?

    A/19
    B/20
    C/21
    D/22

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  3. Question 3Network Fundamentals

    How many usable host addresses are in a /28 subnet?

    A16
    B14 — a /28 has 16 total addresses minus the network address and broadcast address
    C30
    D28

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  4. Question 4Network Fundamentals

    What is the IPv6 link-local address prefix?

    A2001::/32
    BFC00::/7
    CFE80::/10
    DFF00::/8

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  5. Question 5Network Fundamentals

    A company uses 192.168.1.0/24 and needs a subnet with exactly 30 usable host addresses. What subnet mask should be used?

    A/26
    B/27
    C/28
    D/29

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  6. Question 6Network Fundamentals

    Which IPv4 address class provides the default subnet mask 255.255.0.0?

    AClass A
    BClass B
    CClass C
    DClass D

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  7. Question 7IP Connectivity

    What is VLSM (Variable-Length Subnet Masking) and why is it useful?

    AUsing the same subnet mask everywhere
    BUsing different subnet mask lengths within the same network to efficiently allocate IP addresses based on each subnet's actual needs
    CA routing protocol feature
    DA VLAN feature

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  8. Question 8Network Fundamentals

    Which IPv6 address type is equivalent to a public IPv4 address?

    ALink-local
    BUnique local
    CGlobal unicast
    DMulticast

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  9. Question 9IP Connectivity

    What is the dual-stack approach to IPv4-to-IPv6 transition?

    ARunning two separate physical networks
    BRunning both IPv4 and IPv6 simultaneously on the same interfaces and network infrastructure during the transition period
    CConverting all IPv4 addresses to IPv6
    DUsing only IPv6 tunnels

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  10. Question 10Network Fundamentals

    A network engineer needs to assign IP addresses to devices on a /27 subnet. How many usable host addresses are available?

    A14
    B30
    C32
    D62

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  11. Question 11Network Fundamentals

    A network uses the address 172.16.10.0/24. Which of the following is the broadcast address for this subnet?

    A172.16.10.0
    B172.16.10.254
    C172.16.10.255
    D172.16.11.0

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  12. Question 12IP 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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  13. Question 13Network Fundamentals

    Which IPv4 address class provides a default subnet mask of 255.255.0.0?

    AClass A
    BClass B
    CClass C
    DClass D

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  14. Question 14IP Connectivity

    Which IPv6 address type is equivalent to a private IPv4 address and is not routable on the Internet?

    AGlobal unicast (2000::/3)
    BUnique local (FC00::/7)
    CLink-local (FE80::/10)
    DMulticast (FF00::/8)

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Key IP Addressing Concepts for CCNA

ipv4ipv6subnetcidrvlsmsubnettingip addressbroadcastnetwork addressprefix

CCNA IP Addressing Exam Tips

IPv4 & IPv6 Addressing questions in CCNA are typically scenario-based. Focus on network fundamentals, IP connectivity, security basics, and automation concepts. Priority concepts: ipv4, ipv6, subnet, cidr, vlsm, subnetting.

What CCNA Expects

  • Anchor your answer in choose the configuration that correctly applies to the described network topology and requirements.
  • IP Addressing scenarios for CCNA are frequently mapped to Domain 1 (20%), Domain 3 (25%), so read the objective carefully before picking controls or architecture.
  • Expect multi-topic scenarios where IP Addressing 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 IP Addressing Concepts

  • Know the core IP Addressing building blocks cold: ipv4, ipv6, subnet, cidr.
  • Review the edge-case features and limits for vlsm, subnetting; these details are commonly used to differentiate answer choices.
  • Practice service-integration reasoning: how IP Addressing pairs with Routing, DHCP, NAT in real deployment patterns.
  • For CCNA, explain why the chosen IP Addressing 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 Network Fundamentals often include distractors that look correct for IP Addressing 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 IP Addressing implementation paths and justify which one best fits the scenario?
  • Can you map the chosen answer back to Network Fundamentals (20%) outcomes for CCNA?
  • Can you explain security and access boundaries for IP Addressing without relying on default-open assumptions?
  • Can you describe how IP Addressing integrates with Routing and DHCP during failure, scaling, and monitoring events?

Exam Domains Covering IP Addressing

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