- A
Stateless address autoconfiguration: Host generates its own IPv6 address using router advertisements
This is correct because SLAAC (Stateless Address Autoconfiguration) enables a host to generate its own IPv6 address using the prefix from Router Advertisements (RAs) and an interface identifier typically derived from EUI-64.
- B
Stateful DHCPv6: DHCP server assigns IPv6 addresses and other parameters
This is incorrect because Stateful DHCPv6 assigns IPv6 addresses and optionally other parameters, but the statement describes Stateless DHCPv6, which only supplies extra information like DNS server addresses without assigning addresses.
- C
SLAAC: Host uses prefix from RA and EUI-64 to create address
This is incorrect because Stateless DHCPv6 does not assign addresses; it only provides additional configuration parameters like DNS server addresses. Address assignment is done by SLAAC or Stateful DHCPv6.
- D
DHCPv6-PD: DHCPv6 prefix delegation for assigning subnets
This is incorrect because EUI-64 generates the interface identifier (the host portion) of an IPv6 address, not the prefix. The prefix is obtained from Router Advertisements or manual configuration.
Quick Answer
The correct match is SLAAC: Host uses prefix from RA and EUI-64 to create address. This is accurate because Stateless Address Autoconfiguration (SLAAC) relies on Router Advertisement (RA) messages to provide the network prefix, while the host generates its own interface identifier using the EUI-64 process, forming a complete IPv6 address without any stateful server. On the CCNA 200-301 v2 exam, this concept tests your ability to distinguish SLAAC from stateful DHCPv6, which assigns addresses from a server, and from DHCPv6 Prefix Delegation, which delegates entire subnets. A common trap is confusing SLAAC’s stateless nature with stateful DHCPv6—remember that SLAAC uses only RA and EUI-64, never a DHCP server for addressing. For a quick memory tip: “SLAAC stacks the prefix from RA with the EUI-64 interface ID to build a stateless address.”
CCNA IP Routing Practice Question
This 200-301 practice question tests your understanding of ip routing. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: iPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Match each IPv6 host-configuration concept to its most accurate description.
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
Stateless address autoconfiguration: Host generates its own IPv6 address using router advertisements
SLAAC enables stateless autoconfiguration; stateful DHCPv6 assigns addresses; SLAAC uses RA and EUI-64; DHCPv6-PD delegates prefixes; link-local addresses are for local links.
Key principle: IPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Stateless address autoconfiguration: Host generates its own IPv6 address using router advertisements
Why this is correct
This is correct because SLAAC (Stateless Address Autoconfiguration) enables a host to generate its own IPv6 address using the prefix from Router Advertisements (RAs) and an interface identifier typically derived from EUI-64.
Related concept
IPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server.
- ✓
Stateful DHCPv6: DHCP server assigns IPv6 addresses and other parameters
Why this is correct
This is incorrect because Stateful DHCPv6 assigns IPv6 addresses and optionally other parameters, but the statement describes Stateless DHCPv6, which only supplies extra information like DNS server addresses without assigning addresses.
Related concept
IPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server.
- ✓
SLAAC: Host uses prefix from RA and EUI-64 to create address
Why this is correct
This is incorrect because Stateless DHCPv6 does not assign addresses; it only provides additional configuration parameters like DNS server addresses. Address assignment is done by SLAAC or Stateful DHCPv6.
Related concept
IPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server.
- ✓
DHCPv6-PD: DHCPv6 prefix delegation for assigning subnets
Why this is correct
This is incorrect because EUI-64 generates the interface identifier (the host portion) of an IPv6 address, not the prefix. The prefix is obtained from Router Advertisements or manual configuration.
Related concept
IPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Be careful not to confuse the roles of Stateful and Stateless DHCPv6: Stateful assigns addresses, Stateless provides extra info. Also, remember that EUI-64 generates the interface ID, not the prefix.
Detailed technical explanation
How to think about this question
IPv6 host configuration involves multiple mechanisms that enable devices to obtain valid IPv6 addresses and network parameters. SLAAC allows hosts to self-configure their addresses by listening to router advertisements that contain network prefix information. This method relies on the host generating the interface identifier portion of the address, often using the EUI-64 format derived from the MAC address. Link-local addresses are automatically assigned to interfaces for local communication and are essential for the initial configuration steps. The decision process for IPv6 host configuration depends on network design and requirements. SLAAC provides a simple, decentralized method where hosts generate their own addresses, while DHCPv6 offers centralized control for address assignment and additional options. DHCPv6 can operate in stateful mode, assigning addresses and parameters, or stateless mode, providing only configuration details while hosts use SLAAC for addressing. Cisco devices support these mechanisms, and understanding their roles helps in designing and troubleshooting IPv6 networks. A common exam trap is confusing SLAAC with DHCPv6 or assuming that EUI-64 is a configuration protocol rather than an address generation method. Candidates may also overlook the role of link-local addresses in the autoconfiguration process. Practically, network engineers must recognize when to use SLAAC for simplicity or DHCPv6 for more control, and how routers advertise prefixes to enable these mechanisms. Misunderstanding these concepts can lead to incorrect answers on the CCNA exam and misconfiguration in real networks.
KKey Concepts to Remember
- IPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server.
- DHCPv6 provides centralized IPv6 address and configuration parameter assignment, allowing hosts to obtain managed addresses and other network information from a DHCPv6 server.
- Link-local IPv6 addresses are automatically generated on all IPv6-enabled interfaces and are used for local network segment communication without requiring global address configuration.
- The EUI-64 process derives the IPv6 interface identifier by modifying the host’s MAC address, embedding it into the lower 64 bits of the IPv6 address for SLAAC.
- Router advertisements in IPv6 carry prefix information that hosts use to generate their own addresses and learn network parameters, crucial for SLAAC operation.
- Hosts use link-local addresses to communicate with routers during the autoconfiguration process, including receiving router advertisements and sending neighbor discovery messages.
- DHCPv6 can operate in different modes, including stateful mode where it assigns addresses, and stateless mode where it provides only additional configuration parameters.
- IPv6 host configuration mechanisms are distinct but complementary; SLAAC and DHCPv6 serve different roles, and understanding their interaction is critical for CCNA exam success.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
IPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server.
Real-world example
How this comes up in practice
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Got this wrong? Here's your next step.
Review iPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server., then practise related 200-301 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this 200-301 question test?
IP Routing — This question tests IP Routing — IPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server..
What is the correct answer to this question?
The correct answer is: Stateless address autoconfiguration: Host generates its own IPv6 address using router advertisements — SLAAC enables stateless autoconfiguration; stateful DHCPv6 assigns addresses; SLAAC uses RA and EUI-64; DHCPv6-PD delegates prefixes; link-local addresses are for local links.
What should I do if I get this 200-301 question wrong?
Review iPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
IPv6 Stateless Address Autoconfiguration (SLAAC) enables hosts to self-configure their IPv6 addresses using router advertisements without requiring a DHCPv6 server.
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Last reviewed: May 17, 2026
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