IPv6 link-local addresses begin with which prefix?

IPv6 link-local addresses begin with which prefix?

• A. FF00::/8
• B. ::1
• C. 2001:DB8::/32
• D. FE80::/10

Answer: (D)

IPv6 link-local addresses are used for communication on the local network segment and never travel beyond the single link. They are identified by the FE80::/10 prefix, meaning any address that starts with FE80 up to FEBF is a link-local address. This prefix signals that the address is intended only for local-link scope and is typically auto-configured on every IPv6-enabled interface to support essential neighbor discovery and local communication without routers. For context, the other common prefixes correspond to different purposes: FF00::/8 is for multicast, ::1 is the loopback address for the local host, and 2001:DB8::/32 is reserved for documentation and examples.

IPv6 link-local addresses are used for communication on the local network segment and never travel beyond the single link. They are identified by the FE80::/10 prefix, meaning any address that starts with FE80 up to FEBF is a link-local address. This prefix signals that the address is intended only for local-link scope and is typically auto-configured on every IPv6-enabled interface to support essential neighbor discovery and local communication without routers.

For context, the other common prefixes correspond to different purposes: FF00::/8 is for multicast, ::1 is the loopback address for the local host, and 2001:DB8::/32 is reserved for documentation and examples.