This 200-301 practice question tests your understanding of network infrastructure and connectivity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: iPv6 link-local addresses are automatically generated on all IPv6-enabled interfaces using the FE80::/10 prefix for local-link communication.. 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.
Which IPv6 address type is automatically created on an interface and used for link-local communication?
Unique local
Why wrong: Unique local addresses are not automatically the local-link-only address being tested here.
Global unicast
Why wrong: Global unicast addresses are routable beyond the local link.
Link-local
Correct. Link-local addresses are auto-created and used locally.
Anycast
Why wrong: Anycast is an addressing behavior, not the specific auto-created local type.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Link-local
IPv6 interfaces automatically generate a link-local address in FE80::/10 for local-segment functions such as neighbor discovery.
Key principle: IPv6 link-local addresses are automatically generated on all IPv6-enabled interfaces using the FE80::/10 prefix for local-link communication.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Unique local
Why it's wrong here
Unique local addresses are not automatically the local-link-only address being tested here.
When this WOULD be correct
If the exam question asked for an IPv6 address type that is used for private communication within a specific organization or site, without the need for global routing, then 'Unique local' would be the correct answer.
Global unicast
Why it's wrong here
Global unicast addresses are routable beyond the local link.
When this WOULD be correct
If the question asked which IPv6 address type is used for communication over the internet and is routable globally, then 'Global unicast' would be the correct answer. This scenario would focus on addressing types suitable for broader network communication rather than local-link.
Link-local
Why this is correct
Correct. Link-local addresses are auto-created and used locally.
Related concept
IPv6 link-local addresses are automatically generated on all IPv6-enabled interfaces using the FE80::/10 prefix for local-link communication.
Anycast
Why it's wrong here
Anycast is an addressing behavior, not the specific auto-created local type.
When this WOULD be correct
If the question were to ask about the address type that allows for communication with the nearest instance of a service, such as a DNS server, in a multi-homed environment, then 'Anycast' would be the correct answer. This scenario would focus on routing and service discovery rather than local-link communication.
Option-by-option analysis
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
Why this is correct
Correct. Link-local addresses are auto-created and used locally.
Why this is wrong here
Unique local addresses (ULAs) are designed for local communications within a site and are not automatically created on an interface for local-link communication. They require manual configuration and are not used for link-local purposes.
★ When this WOULD be the correct answer
If the exam question asked for an IPv6 address type that is used for private communication within a specific organization or site, without the need for global routing, then 'Unique local' would be the correct answer.
Why candidates choose this
Candidates may confuse unique local addresses with link-local addresses due to their similar purpose of facilitating local communication, leading them to mistakenly select this option when considering local networking scenarios.
Why this is wrong here
Global unicast addresses are routable addresses used for communication over the internet and are not automatically created for local-link communication. They require configuration and are not limited to a single local network segment.
★ When this WOULD be the correct answer
If the question asked which IPv6 address type is used for communication over the internet and is routable globally, then 'Global unicast' would be the correct answer. This scenario would focus on addressing types suitable for broader network communication rather than local-link.
Why candidates choose this
Candidates may confuse global unicast addresses with link-local addresses due to their understanding of IPv6 addressing and the need for unique addresses in a network, leading them to mistakenly think global unicast is relevant for local communication.
Why this is wrong here
Anycast addresses are not automatically created on an interface for local-link communication; they are assigned to multiple interfaces to allow for routing to the nearest one. Therefore, they do not serve the same purpose as link-local addresses.
★ When this WOULD be the correct answer
If the question were to ask about the address type that allows for communication with the nearest instance of a service, such as a DNS server, in a multi-homed environment, then 'Anycast' would be the correct answer. This scenario would focus on routing and service discovery rather than local-link communication.
Why candidates choose this
Candidates may confuse anycast with link-local addresses due to their shared use in network communication. The term 'local' in anycast might mislead them to think it relates to local-link usage.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Be careful not to confuse link-local addresses with global or unique local addresses, which are not automatically generated and serve different purposes.
Detailed technical explanation
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
Key takeaway
IPv6 link-local addresses are automatically generated on all IPv6-enabled interfaces using the FE80::/10 prefix for local-link communication.
Real-world example
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Review iPv6 link-local addresses are automatically generated on all IPv6-enabled interfaces using the FE80::/10 prefix for local-link communication., then practise related 200-301 questions on the same topic to reinforce the concept.
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FAQ
Network Infrastructure and Connectivity — This question tests Network Infrastructure and Connectivity — IPv6 link-local addresses are automatically generated on all IPv6-enabled interfaces using the FE80::/10 prefix for local-link communication..
The correct answer is: Link-local — IPv6 interfaces automatically generate a link-local address in FE80::/10 for local-segment functions such as neighbor discovery.
Review iPv6 link-local addresses are automatically generated on all IPv6-enabled interfaces using the FE80::/10 prefix for local-link communication., then practise related 200-301 questions on the same topic to reinforce the concept.
IPv6 link-local addresses are automatically generated on all IPv6-enabled interfaces using the FE80::/10 prefix for local-link communication.
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Last reviewed: May 17, 2026
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