IPv6 defines multiple types of addresses. Which of the following statements is false about these addresses?

This statement is false because a manually configured link-local address and an automatically generated one (e.g., via EUI-64) do not coexist on the same interface. When an administrator manually configures a link-local address, that configuration overrides and replaces the automatically generated address. The system uses the manually configured address exclusively. Since only one of these addresses can be active on the interface at any given time, the concept of a "priority" or selection between them is not applicable, making the statement technically incorrect.

A. The EUI-64 method is a standard and common process for automatically generating a unique 64-bit interface identifier from a 48-bit MAC address for link-local and other addresses.

B. An anycast address identifies a group of interfaces. Using it as a source address is forbidden because it does not uniquely identify the originating node for return traffic.

C. A fundamental design feature of IPv6 is that a single network interface can be assigned multiple addresses, including multiple global unicast addresses with different prefixes.

1. Huawei HedEx Documentation for VRP: In the NE40E V800R010C10SPC500 Configuration Guide - IP Addresses

the section on "Configuring an IPv6 Address for an Interface" explains that a link-local address is automatically generated by default. The ipv6 address link-local command allows for manual configuration

which then becomes the active link-local address

replacing the automatic one. This demonstrates the override behavior

not a priority system between coexisting addresses.

2. RFC 4291 - IP Version 6 Addressing Architecture:

Section 2.6

"Anycast Addresses": States

"An anycast address must not be used as the source address of an IPv6 packet." This validates option B.

Section 2.8

"A Node's Addresses": States

"A single interface may be assigned multiple IPv6 addresses of any type (unicast

anycast

multicast)..." This validates option C.

Appendix A

"Creating EUI-64 based Interface Identifiers": Describes the algorithm for generating interface identifiers from IEEE EUI-64 or MAC addresses

which is the basis for option A.

3. RFC 6724 - Default Address Selection for Internet Protocol Version 6 (IPv6): This RFC defines the rules for source and destination address selection. It does not contain any rule that gives priority to a manually configured link-local address over an automatically generated one

primarily because they are not expected to coexist on an interface. The selection rules apply to choices between different valid addresses (e.g.

temporary vs. permanent global addresses)

not configuration methods.