IPv6 questions test address types (global unicast, link-local, multicast, anycast), address assignment (SLAAC, DHCPv6, EUI-64), OSPFv3, and dual-stack. The CCNA often presents an IPv6 address and asks you to identify the prefix, type, or calculate the EUI-64 interface ID.
Start Scenario PracticeRefer to the exhibit. Based on the IPv6 configuration of the GigabitEthernet0/0 interface, which statement is true regarding the connectivity of this router?
Explanation: The exhibit shows a GigabitEthernet0/0 interface configured with only a link-local IPv6 address (FE80::/10 range, typically starting with FE80::). A link-local address is automatically generated and is only valid on the local segment; it is never routed beyond the local link. Therefore the router can communicate only with directly connected IPv6 hosts on that link, not with the internet or remote networks.
Which of the following is the correct representation of the IPv6 address 2001:0DB8:0000:0000:0008:0800:200C:417A in compressed format?
Explanation: The correct compressed format is 2001:DB8::8:800:200C:417A. IPv6 compression rules (RFC 5952) allow leading zeros in each group to be omitted and a single contiguous sequence of all-zero groups to be replaced with '::'. Here, the two consecutive zero groups (0000:0000) are replaced by '::', and leading zeros in other groups are dropped (0DB8→DB8, 0008→8, 0800→800).
A network administrator is documenting the IPv6 addressing scheme for a new campus. The administrator must identify which statements about IPv6 address structure and notation are accurate. (Choose two.)
Explanation: IPv6 text representation permits two key shortcuts: suppressing leading zeros inside each hextet and replacing one contiguous run of zero hextets with a double colon. The double colon may appear only once to keep the address unambiguous. Dotted-decimal masks and removal of trailing zeros are not valid, since they would either mix IPv4 conventions or alter the numeric value of the address.
Which IPv6 address type is represented by the prefix fe80::/10?
Explanation: The fe80::/10 prefix is reserved for Link-Local addresses in IPv6. These addresses are automatically configured on all IPv6-enabled interfaces and are essential for neighbor discovery and routing protocol communication on a single local link. Unlike global unicast addresses, these are not routable outside the local segment, making them fundamental for basic connectivity and troubleshooting in IPv6 environments.
Which TWO of the following statements regarding IPv6 address representation are accurate?
Explanation: Option B is correct because RFC 4291 allows leading zeros within any 16-bit hexadecimal field (hextet) to be dropped, so 0db8 can be written as db8. Option D is correct because the double-colon (::) is the compression notation that stands in for one or more consecutive 16-bit groups that are all zeros, and it may appear only once in an address. Option A is wrong because :: can be used only a single time per address; using it twice would make the number of omitted zero groups ambiguous. Option C is wrong because IPv6 addresses are commonly written in compressed form, not always as a full 32-character hexadecimal string. Option E is wrong because only leading zeros may be omitted; trailing zeros are significant and must be retained.
+8 more scenario questions available
Practice all IPv6 Configuration ScenariosIPv6 questions test address types (global unicast, link-local, multicast, anycast), address assignment (SLAAC, DHCPv6, EUI-64), OSPFv3, and dual-stack. The CCNA often presents an IPv6 address and asks you to identify the prefix, type, or calculate the EUI-64 interface ID. These appear throughout the 100-150 and require you to apply your knowledge, not just recall facts.
Cisco doesn't publish an exact breakdown, but scenario-based questions (especially exhibit and command-output formats) make up a significant portion of the 100-150. Practicing each scenario type ensures you're ready for any format.
Yes. Courseiva provides free 100-150 scenario practice across all official exam domains. The platform includes scenario-based questions, command-output interpretation, topic-based practice, mock exams, and readiness tracking — no account required.
Launch a full IPv6 Configuration Scenarios session with instant scoring and detailed explanations.
Start Scenario Practice →