200-301 Question #1354: Real Exam Question with Answer & Explanation

Question

Refer to the exhibit. The IPv6 address for the LAN segment on router R1 must be configured using the EUI-64 format. When configured which Ipv6 address Is produced by the router?

Options

• A2001:db8:1006:1968:4564:877F:FE99:1
• B2001:db8:1006:1968:1119:BEFF:FE67:1
• C2001:db8:1006:1968:1130:ABFF:FECC:1
• D2001:db8:1006:1968:12D8:BAFE:FF01:1

Explanation

The question requires determining the IPv6 address generated using the EUI-64 format from an unspecified router MAC address.

Common mistakes.

• A. This address would be generated from a different MAC address after applying the EUI-64 rules, specifically if the first byte of the MAC address before the 7th bit flip was 47h.
• C. This address would be generated from a different MAC address and different EUI-64 segment than the one corresponding to the correct answer.
• D. This address would be generated from a different MAC address after applying the EUI-64 rules, specifically if the first byte of the MAC address before the 7th bit flip was 10h.

Concept tested. IPv6 EUI-64 Address Generation

Reference. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_basic_connectivity/configuration/xe-3s/ipv6-basic-connectivity-xe-3s-book/ip6-eui64.html

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