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300-410 Practice Question: Which TWO statements about DHCP IPv6 (DHCPv6)…
Which TWO statements about DHCP IPv6 (DHCPv6) operation are true? (Choose TWO.)
⚠ Common exam trap
Cisco often tests the misconception that DHCPv6 uses the same UDP ports as DHCPv4 (67/68) or that it can only run in stateless mode, leading candidates to incorrectly select options D or C.
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
✓
DHCPv6 servers listen on UDP port 547.
DHCPv6 servers listen on UDP port 547, while DHCPv6 clients use UDP port 546. This is defined in RFC 3315 and is a key distinction from DHCPv4, where servers listen on port 67 and clients on port 68. The server uses port 547 to receive requests from clients, ensuring proper separation of DHCPv6 traffic.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DHCPv6 servers listen on UDP port 547.
Why this is correct
DHCPv6 uses UDP port 547 for server communication.
- ✓
Stateless DHCPv6 is used to provide DNS server information to clients that obtain their IPv6 address via SLAAC.
Why this is correct
Stateless DHCPv6 provides additional configuration parameters, not addresses.
- ✗
DHCPv6 can only be used in stateless mode.
Why it's wrong here
DHCPv6 supports both stateful and stateless modes.
- ✗
DHCPv6 uses UDP ports 67 and 68, just like DHCPv4.
Why it's wrong here
DHCPv6 uses UDP ports 546 and 547, not 67 and 68.
- ✗
DHCPv6 relies on ARP to discover DHCPv6 servers.
Why it's wrong here
ARP is not used in IPv6; DHCPv6 uses multicast and link-local addresses.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco 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 300-410 exam.