- A
Global Unicast: Routable over the public internet, assigned by RIRs.
Global Unicast addresses are globally unique and routable on the public internet, assigned by Regional Internet Registries (RIRs) to ISPs and organizations.
- B
Link-Local: Routable across the entire enterprise network, used for inter-VLAN routing.
Why wrong: This is incorrect because Link-Local addresses are only valid on a single link (subnet) and are not routable beyond that link. They are used for neighbor discovery and local communication, not inter-VLAN routing.
- C
Unique Local: Globally unique and routable on the public internet, similar to Global Unicast.
Why wrong: This is incorrect because Unique Local addresses (FC00::/7) are meant for private, internal use within a site or organization and are not routable on the public internet. They are analogous to IPv4 private addresses.
- D
Multicast: Used for one-to-one communication between two specific hosts.
Why wrong: This is incorrect because Multicast addresses are used for one-to-many communication, where a single packet is sent to multiple destinations that have joined the multicast group. One-to-one communication is unicast.
Quick Answer
The correct answer is Global Unicast, as it is the only IPv6 address type designed to be routable over the public internet and assigned by Regional Internet Registries (RIRs). This is because Global Unicast addresses function like public IPv4 addresses, using a hierarchical structure that allows for global routing and aggregation, while other types like Link-Local are confined to a single network segment and cannot be forwarded by routers. On the CCNA 200-301 v2 exam, you will often be asked to match IPv6 address types to their descriptions, with a common trap being confusion between Unique Local (private, site-local) and Global Unicast (public, internet-routable). A key memory tip is to think of Global Unicast as the "go anywhere" address, Link-Local as the "stay local" address that auto-configures on every interface, and Anycast as the "nearest node" address used for load balancing.
CCNA Network Infrastructure and Connectivity Practice Question
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 global unicast addresses are routable on the internet and are used for communication between devices across different networks.. 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 address type or 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
Global Unicast: Routable over the public internet, assigned by RIRs.
Each IPv6 address type has a distinct purpose: Global Unicast for public routing, Link-Local for local segment, Unique Local for private site, Multicast for group communication, Anycast for nearest device, and SLAAC for stateless address assignment.
Key principle: IPv6 global unicast addresses are routable on the internet and are used for communication between devices across different networks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Global Unicast: Routable over the public internet, assigned by RIRs.
Why this is correct
Global Unicast addresses are globally unique and routable on the public internet, assigned by Regional Internet Registries (RIRs) to ISPs and organizations.
Related concept
IPv6 global unicast addresses are routable on the internet and are used for communication between devices across different networks.
- ✗
Link-Local: Routable across the entire enterprise network, used for inter-VLAN routing.
Why it's wrong here
This is incorrect because Link-Local addresses are only valid on a single link (subnet) and are not routable beyond that link. They are used for neighbor discovery and local communication, not inter-VLAN routing.
- ✗
Unique Local: Globally unique and routable on the public internet, similar to Global Unicast.
Why it's wrong here
This is incorrect because Unique Local addresses (FC00::/7) are meant for private, internal use within a site or organization and are not routable on the public internet. They are analogous to IPv4 private addresses.
- ✗
Multicast: Used for one-to-one communication between two specific hosts.
Why it's wrong here
This is incorrect because Multicast addresses are used for one-to-many communication, where a single packet is sent to multiple destinations that have joined the multicast group. One-to-one communication is unicast.
Option-by-option analysis
Why each answer is right or wrong
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.
✓Global Unicast: Routable over the public internet, assigned by RIRs.Correct answer▾
Why this is correct
Global Unicast addresses are globally unique and routable on the public internet, assigned by Regional Internet Registries (RIRs) to ISPs and organizations.
✗Link-Local: Routable across the entire enterprise network, used for inter-VLAN routing.Wrong answer — click to see why▾
Why this is wrong here
Link-Local addresses have a scope of only the local link (FE80::/10) and are never forwarded by routers.
Why candidates choose this
Candidates might confuse Link-Local with Unique Local or think that because routers use Link-Local for neighbor discovery, they are routable.
✗Unique Local: Globally unique and routable on the public internet, similar to Global Unicast.Wrong answer — click to see why▾
Why this is wrong here
Unique Local addresses are not globally routable; they are intended for local communication within a site.
Why candidates choose this
Candidates may think 'unique' implies global uniqueness and routability, but Unique Local addresses are only unique within a limited scope.
✗Multicast: Used for one-to-one communication between two specific hosts.Wrong answer — click to see why▾
Why this is wrong here
Multicast is one-to-many, not one-to-one. Unicast is one-to-one.
Why candidates choose this
Candidates may confuse multicast with unicast or think that multicast is used for specific host-to-host communication.
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
Common exam trap: answer the scenario, not the keyword
The most common trap is confusing the scope of Link-Local and Unique Local addresses. Remember: Link-Local is only for the local link, while Unique Local is for private site-wide use but not internet-routable. Also, don't confuse multicast with unicast.
Detailed technical explanation
How to think about this question
IPv6 addressing introduces several address types, each serving distinct roles in network communication. Global unicast addresses are globally routable and used for communication across the internet or large networks. Link-local addresses are automatically assigned to interfaces and are only valid within the local network segment, facilitating local communication and protocol operations. The loopback address (::1) is a special address that a device uses to send packets to itself, useful for testing and internal processes. EUI-64 is a method used to create the interface identifier portion of an IPv6 address by embedding the device's MAC address, ensuring uniqueness without manual configuration. This method modifies the 48-bit MAC address into a 64-bit interface ID by inserting a fixed 16-bit value and flipping a specific bit. Understanding this construction helps differentiate between address types and how they are formed, which is crucial for CCNA exam questions that mix address scope with address generation techniques. In practical Cisco networking, link-local addresses are essential for routing protocols like OSPFv3 and EIGRP for IPv6, which use these addresses to establish neighbor relationships on the same link. Global unicast addresses enable devices to communicate beyond the local network, while the loopback address provides a stable interface for management and testing. Misunderstanding these distinctions can lead to configuration errors and exam mistakes, so recognizing the role and scope of each address type is vital for both exam success and real-world networking.
KKey Concepts to Remember
- IPv6 global unicast addresses are routable on the internet and are used for communication between devices across different networks.
- IPv6 link-local addresses are automatically configured on all IPv6-enabled interfaces and are used only for communication within the local link or subnet.
- The IPv6 loopback address (::1) identifies the local device itself and is used for testing and internal communication.
- EUI-64 is a method that generates the interface identifier portion of an IPv6 address by embedding a device's MAC address, ensuring unique interface IDs.
- IPv6 address types differ by scope and purpose, and understanding these distinctions is critical for proper network design and troubleshooting.
- Cisco devices use link-local addresses for routing protocols like OSPFv3 and EIGRP for IPv6 to communicate between neighbors on the same link.
- Global unicast addresses in IPv6 are similar to IPv4 public addresses and are assigned by ISPs or internal network administrators for wide-area routing.
- The loopback address in IPv6 is functionally equivalent to the IPv4 127.0.0.1 address and is never assigned to a physical interface.
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 global unicast addresses are routable on the internet and are used for communication between devices across different networks.
Real-world example
How this comes up in practice
A help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
What to study next
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Review iPv6 global unicast addresses are routable on the internet and are used for communication between devices across different networks., 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?
Network Infrastructure and Connectivity — This question tests Network Infrastructure and Connectivity — IPv6 global unicast addresses are routable on the internet and are used for communication between devices across different networks..
What is the correct answer to this question?
The correct answer is: Global Unicast: Routable over the public internet, assigned by RIRs. — Each IPv6 address type has a distinct purpose: Global Unicast for public routing, Link-Local for local segment, Unique Local for private site, Multicast for group communication, Anycast for nearest device, and SLAAC for stateless address assignment.
What should I do if I get this 200-301 question wrong?
Review iPv6 global unicast addresses are routable on the internet and are used for communication between devices across different networks., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
IPv6 global unicast addresses are routable on the internet and are used for communication between devices across different networks.
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Last reviewed: May 17, 2026
This 200-301 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 200-301 exam.
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