Which statement describes a feature of IPv6 link-local addressing?

• A. a Layer 2 service that can provide lower cost UCS with guaranteed minimum performance and availability (Carrier Ethernet)
• B. It requires global routable addresses
• C. Cannot function without routers
• D. Is used for IPv4 only

Answer: (A)

IPv6 link-local addresses are for on-link communications only, meaning they work within a single network segment and are not meant to be routed across the Internet. They’re automatically configured on every IPv6-enabled interface and use the FE80::/10 prefix, typically forming a unique address without any manual setup or global routing configuration. Because they exist solely on the local link, these addresses don’t require global routable addresses, and routers aren’t needed for basic on-link communication. They’re also IPv6-specific, not IPv4.

The statements given don’t describe this behavior: one refers to a Layer 2 service unrelated to addressing, another incorrectly claims global routable addresses are required, another suggests routers are essential, and another implies IPv4 usage only. The correct concept is that link-local IPv6 addresses are automatically configured, are local to the link, and are not globally routable.