Match each IPv6 concept to its most accurate description.
Drag a concept onto its matching description — or click a concept then click the description.
IPv6 addressing used for wider routed communication
IPv6 addressing used only on the local segment
Host self-configuration using router advertisements
OSPF version used for IPv6 routing operation
⚠ Common exam trap
Be careful not to confuse the scope of IPv6 address types. Link-local addresses are not routable, unique local addresses are private, and anycast is one-to-nearest, not one-to-many. Remember that 'local' in link-local means the link, not the site.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
IPv6 address: 128-bit identifier for network interfaces
These pairings accurately define key IPv6 concepts.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
IPv6 address: 128-bit identifier for network interfaces
Why this is correct
An IPv6 address is a 128-bit binary value, usually written as eight groups of four hexadecimal digits separated by colons, that uniquely identifies a network interface on a global or local scale. The larger address space eliminates the scarcity issues of IPv4 and supports hierarchical addressing, with the first 64 bits typically representing the network prefix and the last 64 bits representing the interface identifier. This structure enables efficient routing, automatic address configuration, and built-in support for features like multicast and anycast.
Global unicast address: Publicly routable IPv6 address similar to public IPv4
Why this is correct
Global unicast addresses are assigned from the 2000::/3 range and are globally unique and routable across the public Internet, analogous to public IPv4 addresses. They are structured with a global routing prefix, a subnet ID, and an interface ID, allowing for hierarchical aggregation and efficient routing by ISPs. These addresses are typically allocated by ISPs or regional registries and can be used for direct end-to-end communication without NAT.
Link-local address: Automatically assigned address used for communication within a single network segment
Why this is correct
Link-local addresses are automatically configured on every IPv6-enabled interface using the FE80::/10 prefix, typically derived from the interface's MAC address via EUI-64 or randomly generated. They are only valid on the local link and are never forwarded by routers, so they facilitate neighbor discovery, address autoconfiguration, and on-link communication without requiring global configuration. Because they are self-generated and always available, they enable essential link-layer operations even before a global or unique local address is assigned.
Unique local address: Private IPv6 address analogous to RFC 1918 IPv4 addresses
Why this is correct
Unique local addresses (ULAs) are defined in RFC 4193 and use the FC00::/7 prefix, with the first 8 bits set to 11111101 (FD00::/8) for locally assigned addresses, making them private and not routable on the public Internet. They include a 40-bit randomly generated global ID to minimize collision risk when networks merge, providing an IPv6 counterpart to RFC 1918 private IPv4 addresses. These addresses are designed for internal network communication, such as within an organization, and can be used for services like DNS and internal servers without requiring public address space.
Visual reference
Quick reference
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.