CCNA: Cisco Certified Network Associate — Question 1360

A network engineer must implement an IPv6 configuration on the vlan 2000 interface to create a routable locally-unique unicast address that is blocked from being advertised to the internet. Which configuration must the engineer apply?

Answer options

• A. interface vlan 2000 ipv6 address ff00:0000:aaaa::1234:2343/64
• B. interface vlan 2000 ipv6 address fd00::1234:2343/64
• C. interface vlan 2000 ipv6 address fe80:0000:aaaa::1234:2343/64
• D. interface vlan 2000 ipv6 address fc00:0000:aaaa::a15d:1234:2343:8aca/64

Correct answer: B

Explanation

The correct answer is B, as the address fd00::/8 is designated for Unique Local Addresses (ULAs), which are not routable on the internet. Option A is a multicast address, option C is a link-local address which is not routable beyond the local segment, and option D is also a unique local address but is improperly formatted and contains too many segments.