Which range of link-local addresses can be assigned to an IPv6-enabled interface?

Which range of link-local addresses can be assigned to an IPv6-enabled interface?

• A. FE00::/8
• B. FE80::/10
• C. FC00::/7
• D. FEC0::/10

Answer: (B)

The range of link-local addresses for an IPv6-enabled interface is defined by the address block FE80::/10. This means that any IPv6 address that begins with the prefix FE80 through FEBF is a valid link-local address. Link-local addresses are used for communication between nodes on the same local link or network segment and are not routed beyond that link, making them essential for certain types of local communication, such as neighbor discovery and address autoconfiguration. The other address ranges mentioned do not serve the function of link-local addresses. For example, FE00::/8 is associated with future use and does not correspond to link-local addresses. FC00::/7 designates Unique Local Addresses (ULAs), which operate similarly to private addresses in IPv4, allowing for local internet communication but not within the global scope. FEC0::/10 was previously proposed for site-local use, but it has been deprecated in favor of ULAs. Thus, the correct selection aligns with the established standard for link-local addressing in IPv6 networks.

The range of link-local addresses for an IPv6-enabled interface is defined by the address block FE80::/10. This means that any IPv6 address that begins with the prefix FE80 through FEBF is a valid link-local address. Link-local addresses are used for communication between nodes on the same local link or network segment and are not routed beyond that link, making them essential for certain types of local communication, such as neighbor discovery and address autoconfiguration.

The other address ranges mentioned do not serve the function of link-local addresses. For example, FE00::/8 is associated with future use and does not correspond to link-local addresses. FC00::/7 designates Unique Local Addresses (ULAs), which operate similarly to private addresses in IPv4, allowing for local internet communication but not within the global scope. FEC0::/10 was previously proposed for site-local use, but it has been deprecated in favor of ULAs. Thus, the correct selection aligns with the established standard for link-local addressing in IPv6 networks.