正解:B,D
Answer B,D is correct: B. 2001:701:1046:1111::1/64; D. 2002:5121:204b:1111::1/64. For router-to-router IPv6 connectivity on a shared link, each router needs a usable unicast IPv6 address in the same link prefix.
The global unicast-looking addresses in options B and D are the valid choices for that purpose. Multicast addresses such as FF02-based addresses identify groups, not individual router interfaces for normal source
/destination connectivity. IPv4-mapped or malformed addresses do not meet the requirement. Cisco CCNA
200-301 v1.1 Network Fundamentals expects engineers to distinguish unicast, multicast, link-local, and special IPv6 address forms. A shared link between routers can use link-local addresses for some control-plane protocols, but for the addressing choices shown here, the usable unicast interface addresses are the correct selections. The corrected answer is B and D because those addresses can be assigned to router interfaces to support communication across the link.