Cisco Certified Internetwork Expert (CCIE) Practice Test

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What are the two types of unicast addresses in IPv6 addressing?

Static
Global
Established
Link-local

The correct answer is: Global

In IPv6 addressing, there are indeed two distinct types of unicast addresses: global addresses and link-local addresses. Global unicast addresses are routable over the internet and are assigned by the Internet Assigned Numbers Authority (IANA) or local Internet Registries (LIRs). They provide a unique identifier for interfaces on the global network and allow for direct communication between devices across different networks. Link-local addresses, on the other hand, are used for communication between nodes on the same local network segment. These addresses are not routable beyond that segment, which means they are useful for network discovery and require no configuration for basic operations like neighbor discovery. Static and established are not recognized classifications of unicast addresses in the context of IPv6. Static refers more to how an address can be assigned, while established is not a term commonly used in the context of addressing types in networking. Thus, the correct answer highlights the two main categories of unicast addresses relevant for IPv6 communication.