Fe80::F856:02AA is a valid link-local (APIPA) IPv6 address.

• A. True
• B. False
• C. It is an IPv4 address
• D. It is a multicast address

Answer: (A)

IPv6 link-local addresses are used for local-link communication and are automatically configured on every IPv6-enabled interface. They live in the FE80::/10 range, so any address starting with FE80 is a link-local address and not routable beyond the local network.

Fe80::F856:02AA fits that prefix. The :: compresses a run of zero-valued 16-bit blocks, so expanding it gives Fe80:0000:0000:0000:0000:0000:F856:02AA, a valid 128-bit IPv6 address. The lowercase Fe80 is still FE80 in IPv6 notation, which is case-insensitive, so this is legitimate.

Note that APIPA is a term from IPv4 for automatic private addressing; IPv6 uses link-local addresses for local-link communication instead. Also, this address is not a multicast address (multicast would start with ff).