CCNA: Cisco Certified Network Associate — Question 4

Which command automatically generates an IPv6 address from a specified IPv6 prefix and MAC address of an interface?

Answer options

• A. ipv6 address dhcp
• B. ipv6 address 2001:DB8:5:112::/64 eui-64
• C. ipv6 address autoconfig
• D. ipv6 address 2001:DB8:5:112::2/64 link-local

Correct answer: B

Explanation

The command 'ipv6 address 2001:DB8:5:112::/64 eui-64' is correct because it specifically incorporates the EUI-64 format to generate an IPv6 address from the MAC address. The other options do not utilize the MAC address in this manner; 'ipv6 address dhcp' relies on DHCP for address assignment, 'ipv6 address autoconfig' is used for automatic address configuration without specifying a prefix, and 'ipv6 address 2001:DB8:5:112::2/64 link-local' is a static address assignment.