Observe the following options, what is the hierarchy for IPv6 aggregatable addresses?

A. Global, site, loop
B. Multicast, anycast, unicast
C. Public, site, interface
D. Internet, site, interface
Correct Answer: C
Section: IP addressing
Global Unicast Addresses
IPv6 global addresses connect to the public network. These unicast addresses are globally unique and routable. This address format is initially defined in RFC
2374. RFC 3587 provides updates to the format. The original specification defined the address format with a three-layer hierarchy: public topology, site topology,
and interface identifier.
The public topology consisted of service providers that provided transit services and exchanges of routing information. It used a top-level aggregator (TLA)
identifier and a next-level identifier. A site-level aggregator (SLA) was used for site topology.
The site topology is local to the company or site and does not provide transit services. The TLA, NLA, and SLA identifiers are deprecated by RFC 3587. RFC
3587 simplifies these identifiers with a global routing prefix and subnet identifier for the network portion of the address.

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