200-301: Cisco Certified Network AssociateDemo

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QuestionQ626

IP Connectivity

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Refer to the exhibit.

IPv6 is being implemented within the enterprise. The command ipv6 unicast-routing is configured. Interface Gig0/0 on R1 must be configured to provide a dynamic assignment using the assigned IPv6 block.

Which command accomplishes this task?

  • A ipv6 address 2001:DB8:FFFF:FCF3::64 link-local
  • B ipv6 address 2001:DB8:FFFF:FCF3::1/64
  • C ipv6 address 2001:DB8:FFFF:FCF3::64 eui-64
  • D ipv6 address autoconfig 2001:DB8:FFFF:FCF2::/64
Explanation

The correct command is the one that assigns Gig0/0 a global unicast IPv6 address from the shown 2001:DB8:FFFF:FCF3::/64 prefix while dynamically generating the interface ID. In Cisco IOS, the eui-64 keyword uses the specified /64 prefix and derives the host portion automatically from the interface MAC address. A plain /64 address is static, a link-local address does not use the routed global prefix for LAN addressing, and autoconfig is used for a device to learn its own address from router advertisements rather than to configure this router interface from the given block.

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