200-301: Cisco Certified Network AssociateDemo

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QuestionQ883

IP Connectivity

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Refer to the exhibit. Which format corresponds to the Modified EUI-64 IPv6 interface address for the network 2001:db8::/64?

  • A 2001:db8::5000:00ff:fe04:0000/64
  • B 2001:db8::4332:5800:41ff:fe06:/64
  • C 2001:db8::5000:0004:5678:0090/64
  • D 2001:db8::5200:00ff:fe04:0000/64
Explanation

A Modified EUI-64 IPv6 interface ID is formed from the 48-bit MAC address by inserting FF:FE in the middle and inverting the universal/local bit of the first octet. From MAC 5000.0004.0000 (50:00:00:04:00:00), inserting FF:FE gives 50:00:00:FF:FE:04:00:00, and flipping the first-octet U/L bit changes 50 to 52. The resulting interface ID is 5200:00ff:fe04:0000, so with prefix 2001:db8::/64 the full address is 2001:db8::5200:00ff:fe04:0000/64.

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