200-301: Cisco Certified Network AssociateDemo

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QuestionQ932

IP Connectivity

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Refer to the exhibit. The IPv6 address for the LAN segment on router R1 must be configured by using EUI-64 format. When it is configured, which IPv6 address is generated by the router?

  • A 2001:db8:1006:1968:4564:877F:FE99:1
  • B 2001:db8:1006:1968:1119:BEFF:FE67:1
  • C 2001:db8:1006:1968:1130:ABFF:FECC:1
  • D 2001:db8:1006:1968:12D8:BAFE:FF01:1
Explanation

EUI-64 derives the 64-bit interface ID by taking the 48-bit MAC address, inserting FFFE in the middle, and inverting the universal/local (U/L) bit of the first byte. For MAC 13-19-be-67-00-01, this produces 13→11 (after inverting bit 7), followed by 19-be-FFFE-67-00-01, yielding the interface ID 1119:BEFF:FE67:0001. Combined with the /64 prefix 2001:db8:1006:1968::/64, the result is 2001:db8:1006:1968:1119:BEFF:FE67:1.

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