Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
Which IPv6 address type is automatically created on an interface and used for communication on the local link only?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Global unicast
Global unicast is routable beyond the local link.
B
Best answer
Link-local
Correct. Link-local addresses exist per link and are not routed.
C
Distractor review
Unique local
Unique local addresses are similar to private IPv4 addressing and are not automatically the local-link-only operational address being asked about here.
D
Distractor review
Multicast
Multicast is not an interface address type in the same sense as a host unicast address.
Common exam trap
Common exam trap: answer the scenario, not the keyword
A common exam trap is confusing link-local addresses with unique local or global unicast addresses. Link-local addresses are automatically generated and only valid on the local link, whereas unique local addresses resemble private IPv4 addresses but are routable within an organization. Multicast addresses are not assigned to interfaces for unicast communication, so selecting multicast is incorrect. Understanding the scope and automatic generation of link-local addresses is critical.
Technical deep dive
How to think about this question
IPv6 link-local addresses are automatically generated on all IPv6-enabled interfaces and use the FE80::/10 prefix. These addresses are essential for communication on the local link only and cannot be routed beyond it. They are used by critical IPv6 functions such as Neighbor Discovery Protocol (NDP), which replaces ARP in IPv4, and routing protocols like OSPFv3 and EIGRP for IPv6, which rely on link-local addresses to establish neighbor adjacencies. The link-local address is typically formed by combining the FE80::/10 prefix with the interface identifier, often derived from the MAC address using the Modified EUI-64 format. Unique local addresses (ULA) use the FC00::/7 prefix and provide private IPv6 addressing within an organization but are routable internally, unlike link-local addresses. Global unicast addresses are globally routable and assigned by ISPs. Multicast addresses are used to send packets to multiple destinations but are not assigned as interface addresses for unicast communication. Understanding the role and scope of link-local addresses is fundamental for IPv6 network operations and troubleshooting.
KKey Concepts to Remember
- IPv6 link-local addresses (FE80::/10)
- Neighbor Discovery Protocol (NDP)
- IPv6 routing protocols use link-local addresses
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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A router learns the same prefix from both OSPF and EIGRP. Which route is installed by default?
Question 2
A router shows this output: R1#show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.1.1.2 1 FULL/DR 00:00:34 192.168.12.2 GigabitEthernet0/0 10.1.1.3 1 2WAY/DROTHER 00:00:39 192.168.12.3 GigabitEthernet0/0 Which statement is correct?
Question 3
What is the OSPF metric called?
Question 4
A non-root switch has two uplinks toward the root bridge. One path has a lower total STP cost than the other. What role will the lower-cost uplink have?
Question 5
A router interface applies this ACL inbound: 10 deny tcp any any eq 80 20 permit ip any any A user reports that web browsing to a server by IP address fails, but ping works. Which statement best explains the behavior?
Question 6
A router learns route 198.51.100.0/24 from OSPF with AD 110 and also has a static route to the same prefix configured with AD 150. Which route is installed?
FAQ
Questions learners often ask
What does this 200-301 question test?
IPv6 link-local addresses (FE80::/10)
What is the correct answer to this question?
The correct answer is: Link-local — Every IPv6-enabled interface generates a link-local address, typically in the FE80::/10 range. It is used for neighbor discovery, local communication, and next-hop resolution on the same link.
What should I do if I get this 200-301 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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